एपीए उद्धरण

Harold R Doughty. (1994). Guide to American graduate schools. New York: Penguin Books.

शिकागो स्टाइल उद्धरण

Harold R Doughty. Guide to American Graduate Schools. New York: Penguin Books, 1994.

एमएलए उद्धरण

Harold R Doughty. Guide to American Graduate Schools. New York: Penguin Books, 1994.