APA (7e ed.) Bronvermelding

Não informado. (1960). Bibliography. International Institute for Land Reclamation and Improvement.

Chicago (17e ed.) Bronvermelding

Não informado. Bibliography. Wageningen, Holanda: International Institute for Land Reclamation and Improvement, 1960.

MLA (8e ed.) Bronvermelding

Não informado. Bibliography. International Institute for Land Reclamation and Improvement, 1960.

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