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?].
Παραπομπή σε μορφή Chicago (17η εκδ.)Iowa State University. Agricultural and Home Economics Experiment Station και Iowa State University. Cooperative Extension Service. Bulletin P. Ames: [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State University?], 1959.
Παραπομπή σε μορφή MLA (8th εκδ.)Iowa State University. Agricultural and Home Economics Experiment Station και Iowa State University. Cooperative Extension Service. Bulletin P. [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State University?], 1959.