Não informado. (1979). Working paper series. International Potato Center, Social Science Department.
Chicago-Zitierstil (17. Ausg.)Não informado. Working Paper Series. Lima: International Potato Center, Social Science Department, 1979.
MLA-Zitierstil (8. Ausg.)Não informado. Working Paper Series. International Potato Center, Social Science Department, 1979.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.