APA (7e ed.) Bronvermelding

Não informado. (1979). Working paper series. International Potato Center, Social Science Department.

Chicago (17e ed.) Bronvermelding

Não informado. Working Paper Series. Lima: International Potato Center, Social Science Department, 1979.

MLA (8e ed.) Bronvermelding

Não informado. Working Paper Series. International Potato Center, Social Science Department, 1979.

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