Iowa State College. Agricultural and Home Economics Experiment Station & Iowa. State College of Agriculture and Mechanic Arts, Ames. Extension Service in Agriculture and Home Economics. Farm science reporter.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Iowa State College. Agricultural and Home Economics Experiment Station و Ames. Extension Service in Agriculture and Home Economics Iowa. State College of Agriculture and Mechanic Arts. Farm Science Reporter. Ames, Iowa.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Iowa State College. Agricultural and Home Economics Experiment Station و Ames. Extension Service in Agriculture and Home Economics Iowa. State College of Agriculture and Mechanic Arts. Farm Science Reporter.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.