توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

National Council of Applied Economic Research. (1980). Implications of tractorisation for farm employment, productivity, and income. National Council of Applied Economic Research.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

National Council of Applied Economic Research. Implications of Tractorisation for Farm Employment, Productivity, and Income. New Delhi: National Council of Applied Economic Research, 1980.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

National Council of Applied Economic Research. Implications of Tractorisation for Farm Employment, Productivity, and Income. National Council of Applied Economic Research, 1980.