APA (7th ed.) Citation

Ouattara, M., Hallmark, C. T., Hossner, L. R., & Smeins, F. E. (1990). A study of two toposequences of the dry valley systems of western Niger (West Africa) /.

Chicago Style (17th ed.) Citation

Ouattara, Mamadou, C. Tom Hallmark, Lloyd R. Hossner, and Fred E. Smeins. A Study of Two Toposequences of the Dry Valley Systems of Western Niger (West Africa) /. 1990.

MLA (9th ed.) Citation

Ouattara, Mamadou, et al. A Study of Two Toposequences of the Dry Valley Systems of Western Niger (West Africa) /. 1990.