توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Wakhusama, S., & Kanyi, B. (2002). Biotechnology in tree production: Creating a self-sustaining production and dissemination system in Kenya. International Service for the Acquisition of Agri-Biotech Applications.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Wakhusama, Samuel, و Benson Kanyi. Biotechnology in Tree Production: Creating a Self-sustaining Production and Dissemination System in Kenya. Ithaca, N.Y: International Service for the Acquisition of Agri-Biotech Applications, 2002.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Wakhusama, Samuel, و Benson Kanyi. Biotechnology in Tree Production: Creating a Self-sustaining Production and Dissemination System in Kenya. International Service for the Acquisition of Agri-Biotech Applications, 2002.