एपीए उद्धरण

Heller, R. (1976). Once and Future Manager. Associated Business Programs.

शिकागो स्टाइल उद्धरण

Heller, Robert. Once and Future Manager. London: Associated Business Programs, 1976.

एमएलए उद्धरण

Heller, Robert. Once and Future Manager. Associated Business Programs, 1976.