APA (7e ed.) Bronvermelding

Não informado. (1953). Philippine Geographical Journal. Philippine Geographical Society.

Chicago (17e ed.) Bronvermelding

Não informado. Philippine Geographical Journal. Manila: Philippine Geographical Society, 1953.

MLA (8e ed.) Bronvermelding

Não informado. Philippine Geographical Journal. Philippine Geographical Society, 1953.

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