توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Peter Songan, 1. (1992). Perceived motivations and deterrents associated with participation of peasants in rural development programs in Sarawak, Malaysia. Cornell University Press.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Peter Songan, 1954. Perceived Motivations and Deterrents Associated with Participation of Peasants in Rural Development Programs in Sarawak, Malaysia. Ithaca, N.Y: Cornell University Press, 1992.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Peter Songan, 1954. Perceived Motivations and Deterrents Associated with Participation of Peasants in Rural Development Programs in Sarawak, Malaysia. Cornell University Press, 1992.