Citazione Stile APA (7a Edizione)

Nwana, M. T., Amawa, S. G., & Ban, B. (2009). Basic themes in physical and practical geography: For secondary schools (Revised edition.). NAB Ventures.

Citazione stile Chigago Style (17a edizione)

Nwana, Martin T., Sani G. Amawa, e Blaise Ban. Basic Themes in Physical and Practical Geography: For Secondary Schools. Revised edition. Bamenda: NAB Ventures, 2009.

Citatione MLA (9a ed.)

Nwana, Martin T., et al. Basic Themes in Physical and Practical Geography: For Secondary Schools. Revised edition. NAB Ventures, 2009.