एपीए उद्धरण

(2007). Geologica: Earth's geological past. Millenium House.

शिकागो स्टाइल उद्धरण

Geologica: Earth's Geological Past. Australia: Millenium House, 2007.

एमएलए उद्धरण

Geologica: Earth's Geological Past. Millenium House, 2007.