एपीए उद्धरण

Friedman, A. (1969). Partial differential equations. New York.

शिकागो स्टाइल उद्धरण

Friedman, Avner. Partial Differential Equations. New York, 1969.

एमएलए उद्धरण

Friedman, Avner. Partial Differential Equations. New York, 1969.