एपीए उद्धरण

Leech, J. A., Gervais, A., & Ruben, F. L. (1987). Efficacy of pneumococcal vaccine in severe chronic obstructive pulmonary disease.

शिकागो स्टाइल उद्धरण

Leech, J A., A. Gervais, और F L. Ruben. Efficacy of Pneumococcal Vaccine in Severe Chronic Obstructive Pulmonary Disease. 1987.

एमएलए उद्धरण

Leech, J A., A. Gervais, और F L. Ruben. Efficacy of Pneumococcal Vaccine in Severe Chronic Obstructive Pulmonary Disease. 1987.