APA (7th ed.) Citation

Downs, R. E., & Reyna, S. P. (1976). Socio-economic report on the 10th region of Mauritania. [publisher not identified].

Chicago Style (17th ed.) Citation

Downs, R. E., and Stephen P. Reyna. Socio-economic Report on the 10th Region of Mauritania. [Place of publication not identified]: [publisher not identified], 1976.

MLA (9th ed.) Citation

Downs, R. E., and Stephen P. Reyna. Socio-economic Report on the 10th Region of Mauritania. [publisher not identified], 1976.