APA

International Potato Center C., . (1989). Annual report 1989 : worldwide potato and sweet potato improvement / International Potato Center. Lima: International Potato Center.

Chicago

International Potato Center Cip, . 1989. Annual report 1989 : worldwide potato and sweet potato improvement / International Potato Center. Lima: International Potato Center.

Harvard

International Potato Center C., . (1989). Annual report 1989 : worldwide potato and sweet potato improvement / International Potato Center. Lima: International Potato Center.

MLA

International Potato Center Cip, . Annual report 1989 : worldwide potato and sweet potato improvement / International Potato Center. Lima: International Potato Center. 1989.