एपीए उद्धरण

Colton, J. (1970). Twentieth Century. Time-Life International.

शिकागो स्टाइल उद्धरण

Colton, Joel. Twentieth Century. Nederland: Time-Life International, 1970.

एमएलए उद्धरण

Colton, Joel. Twentieth Century. Time-Life International, 1970.