APA (7th ed.) Citation

R. P. Black & Y. M. Simaika. (1951). The Nile basin: The future conservation of the Nile. eastern press.

Chicago Style (17th ed.) Citation

R. P. Black and Y. M. Simaika. The Nile Basin: The Future Conservation of the Nile. Cairo: eastern press, 1951.

MLA (9th ed.) Citation

R. P. Black and Y. M. Simaika. The Nile Basin: The Future Conservation of the Nile. eastern press, 1951.