एपीए उद्धरण

Gill, P. J., & Russell, C. F. J. (1987). Perforated duodenal ulcer: Which operation?

शिकागो स्टाइल उद्धरण

Gill, P J., और C F J. Russell. Perforated Duodenal Ulcer: Which Operation? 1987.

एमएलए उद्धरण

Gill, P J., और C F J. Russell. Perforated Duodenal Ulcer: Which Operation? 1987.