Iowa State University. Agricultural and Home Economics Experiment Station & Iowa State University. Cooperative Extension Service. (1959). Bulletin P. [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State University?].
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Iowa State University. Agricultural and Home Economics Experiment Station và Iowa State University. Cooperative Extension Service. Bulletin P. Ames: [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State University?], 1959.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Iowa State University. Agricultural and Home Economics Experiment Station và Iowa State University. Cooperative Extension Service. Bulletin P. [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State University?], 1959.