APA (7e ed.) Bronvermelding

Não informado. (1969). Abstracts with programs. Geological Society of America.

Chicago (17e ed.) Bronvermelding

Não informado. Abstracts with Programs. Boulder, Colo: Geological Society of America, 1969.

MLA (8e ed.) Bronvermelding

Não informado. Abstracts with Programs. Geological Society of America, 1969.

Let op: Deze citaties zijn niet altijd 100% accuraat.