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?].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Iowa State University. Agricultural and Home Economics Experiment Station و Iowa State University. Cooperative Extension Service. Bulletin P. Ames: [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State University?], 1959.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Iowa State University. Agricultural and Home Economics Experiment Station و Iowa State University. Cooperative Extension Service. Bulletin P. [Agricultural and Home Economics Experiment Station, Cooperative Extension Service, Iowa State University?], 1959.