एपीए उद्धरण

Essick, E. L. (1973). RPG for system/360 and system/370. Harper & Row.

शिकागो स्टाइल उद्धरण

Essick, Edward L. RPG for System/360 and System/370. New York: Harper & Row, 1973.

एमएलए उद्धरण

Essick, Edward L. RPG for System/360 and System/370. Harper & Row, 1973.