एपीए उद्धरण

International Union of Geological Society. (1993). Episodes,vol.16&17.

शिकागो स्टाइल उद्धरण

International Union of Geological Society. Episodes,vol.16&17. International Union of Geological Society, 1993.

एमएलए उद्धरण

International Union of Geological Society. Episodes,vol.16&17. 1993.