एपीए उद्धरण

Emery, F. E. (1969). Systems thinking. England: Penguin Books.

शिकागो स्टाइल उद्धरण

Emery, F. E. Systems Thinking. England: Penguin Books, 1969.

एमएलए उद्धरण

Emery, F. E. Systems Thinking. England: Penguin Books, 1969.