APA (7e ed.) Bronvermelding

Não informado. (1956). Ports and Harbors. International Association of Ports and Harbors.

Chicago (17e ed.) Bronvermelding

Não informado. Ports and Harbors. Tokyo: International Association of Ports and Harbors, 1956.

MLA (8e ed.) Bronvermelding

Não informado. Ports and Harbors. International Association of Ports and Harbors, 1956.

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