एपीए उद्धरण

American association of petroleum geologists. (1917). American association of petroleum geologists (AAPG) bulletin. American association of petroleum geologists, Inc.

शिकागो स्टाइल उद्धरण

American association of petroleum geologists. American Association of Petroleum Geologists (AAPG) Bulletin. Oklahoma: American association of petroleum geologists, Inc, 1917.

एमएलए उद्धरण

American association of petroleum geologists. American Association of Petroleum Geologists (AAPG) Bulletin. American association of petroleum geologists, Inc, 1917.