APA-referens (7:e uppl.)

Medina, J. (1980). Costs involved in the domestic production of agri-based import substitutes: White corn, Northern Mindanao. Special Studies Division, Planning Service, Ministry of Agriculture.

Chicago-referens (17:e uppl.)

Medina, J.P. Costs Involved in the Domestic Production of Agri-based Import Substitutes: White Corn, Northern Mindanao. Quezon City: Special Studies Division, Planning Service, Ministry of Agriculture, 1980.

MLA-referens (9:e uppl.)

Medina, J.P. Costs Involved in the Domestic Production of Agri-based Import Substitutes: White Corn, Northern Mindanao. Special Studies Division, Planning Service, Ministry of Agriculture, 1980.