توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Yerima, B. P. K., & Opara, C. C. (2014). The impact of climate change on Sub-Saharan Africa: Case studies in Cameroon, Nigeria and Uganda (First edition.). PL Academic Research.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Yerima, Bernard P. K., و Chukwuemeka Christopher Opara. The Impact of Climate Change on Sub-Saharan Africa: Case Studies in Cameroon, Nigeria and Uganda. First edition. Frankfurt am Main, [Germany]: PL Academic Research, 2014.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Yerima, Bernard P. K., و Chukwuemeka Christopher Opara. The Impact of Climate Change on Sub-Saharan Africa: Case Studies in Cameroon, Nigeria and Uganda. First edition. PL Academic Research, 2014.