Παραπομπή σε μορφή APA (7η εκδ.)

Cleaver, K. M., & Schreiber, G. A. (1994). Reversing the spiral: The population, agriculture, and environment nexus in Sub-Saharan Africa. World Bank.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cleaver, Kevin M., και Götz A. Schreiber. Reversing the Spiral: The Population, Agriculture, and Environment Nexus in Sub-Saharan Africa. Washington, D.C.: World Bank, 1994.

Παραπομπή σε μορφή MLA (9th εκδ.)

Cleaver, Kevin M., και Götz A. Schreiber. Reversing the Spiral: The Population, Agriculture, and Environment Nexus in Sub-Saharan Africa. World Bank, 1994.