The general format for references, including punctuation
1. Journals
- citing journal articles

Examples:
- Domanski G, Konarzewski B, Pawlowski Z, Zaremba K, Marzec J, Trybula A, Kurjata R.
The use of the Monte Carlo method to determine optical parameters of tissue.
Pol J Med Phys Eng. 2007;13(1):23-32.
- Petitti DB, Crooks VC, Buckwalter JG, Chiu V. Blood pressure levels before dementia. Arch Neurol. 2005 Jan;62(1):112-6.
- Hallal AH, Amortegui JD, Jeroukhimov IM, Casillas J, Schulman CI, Manning RJ, et al. Magnetic resonance cholangiopancreatography accurately detects common bile duct stones in resolving gallstone pancreatitis. J Am Coll Surg. 2005 Jun;200(6):869-75.
- American Diabetes Association. Diabetes update. Nursing. 2003 Nov;Suppl:19-20, 24.
- Nyporko AIu, Demchuk ON, Blium IaB. [Analysis of structural characteristics of alpha-tubulins in plants with enhanced cold tolerance]. Tsitol Genet. 2003 Nov-Dec;37(6):3-11. Russian.
- Ni H, Qing D, Kaisa S, Lu J. [The study on the effect of LBP on cleaning hydroxygen free radical by EPR technique]. Zhong Yao Cai. 2004 Aug;27(8):599-600. Chinese.
- Doherty DE, Briggs DD Jr. Long-term nonpharmacologic management of patients with chronic obstructive pulmonary disease. Clin Cornerstone. 2004;Suppl 2:S29-34.
- citing parts of journal articles

- citing forthcoming ("in press") journal articles

2. Books
- citing entire books

- citing individual volumes of books with a separate title but without separate authors/editors

- citing individual volumes of books with a separate title and separate authors/editors

- citing parts of books

- citing contributions to books

- citing forthcoming ("in press") books

3. Conference Publications
- citing conference proceedings with a title for the book of proceedings as well as a conference title

- citing conference proceedings with only a conference title

- citing conference papers with a title for the book of proceedings as well as a conference title

- citing conference papers with only a conference title

4. Scientific and Technical Reports
- citing entire reports written and published by the sponsoring organization

- citing entire reports written by the performing organization and published by the sponsoring organization

- citing entire reports written and published by the performing organization

5. Dissertations and Theses
- citing entire dissertations

- citing entire masters' theses

- citing parts of dissertations

- citing parts of masters' theses

6. Web sites
- citing homepages

- parts of web sites

Please consult NLM’s Citing Medicine for detailed information on recommended formats for a variety of reference types.