APA ציטוט

Lip, G. Y., & Singh, S. P. (1995). Nitrates and severe aortic stenosis.

Citação norma Chicago

Lip, G. Y., and S. P. Singh. Nitrates and Severe Aortic Stenosis. 1995.

ציטוט MLA

Lip, G. Y., and S. P. Singh. Nitrates and Severe Aortic Stenosis. 1995.