एपीए उद्धरण

Gregg, P. M. (1976). Problems of Theory in Policy Analysis. Lexington Books.

शिकागो स्टाइल उद्धरण

Gregg, Phillip M. Problems of Theory in Policy Analysis. Toronto: Lexington Books, 1976.

एमएलए उद्धरण

Gregg, Phillip M. Problems of Theory in Policy Analysis. Lexington Books, 1976.