توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Sisay, A. (1988). World food and agriculture: Some problems and issues : papers presented in a seminar series. W.E. Upjohn Institute for Employment Research.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Sisay, Asefa. World Food and Agriculture: Some Problems and Issues : Papers Presented in a Seminar Series. Kalamazoo, Mich: W.E. Upjohn Institute for Employment Research, 1988.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Sisay, Asefa. World Food and Agriculture: Some Problems and Issues : Papers Presented in a Seminar Series. W.E. Upjohn Institute for Employment Research, 1988.