Clawson, M., Landsberg, H. H., & Alexander, L. T. (1971). The agricultural potential of the Middle East. American Elsevier Pub. Co..
Cita Chicago (17th ed.)Clawson, Marion, Hans H. Landsberg, i Lyle T. Alexander. The Agricultural Potential of the Middle East. New York: American Elsevier Pub. Co., 1971.
Cita MLA (9th ed.)Clawson, Marion, et al. The Agricultural Potential of the Middle East. American Elsevier Pub. Co., 1971.
Atenció: Aquestes cites poden no estar 100% correctes.