एपीए उद्धरण

Willard D Morgan. (1974). The Encyclopedia Of Photography Vol 2.

शिकागो स्टाइल उद्धरण

Willard D Morgan. The Encyclopedia Of Photography Vol 2. Greystone Press , Newyork, 1974.

एमएलए उद्धरण

Willard D Morgan. The Encyclopedia Of Photography Vol 2. 1974.