APA (7e ed.) Bronvermelding

Não informado. (2001). Volcano letter. Hawaiian Volcano Research Association.

Chicago (17e ed.) Bronvermelding

Não informado. Volcano Letter. Honolulu, Hawaii: Hawaiian Volcano Research Association, 2001.

MLA (8e ed.) Bronvermelding

Não informado. Volcano Letter. Hawaiian Volcano Research Association, 2001.

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