APA (7e ed.) Bronvermelding

Não informado. Ports and Dredging & Oil Report. I.H.C. Holland.

Chicago (17e ed.) Bronvermelding

Não informado. Ports and Dredging & Oil Report. Rotterdam, Holanda: I.H.C. Holland.

MLA (8e ed.) Bronvermelding

Não informado. Ports and Dredging & Oil Report. I.H.C. Holland.

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