Clawson, M., Landsberg, H. H., & Alexander, L. T. (1971). The agricultural potential of the Middle East. American Elsevier Pub. Co..
Παραπομπή σε μορφή Chicago (17η εκδ.)Clawson, Marion, Hans H. Landsberg, και Lyle T. Alexander. The Agricultural Potential of the Middle East. New York: American Elsevier Pub. Co., 1971.
Παραπομπή σε μορφή MLA (9th εκδ.)Clawson, Marion, et al. The Agricultural Potential of the Middle East. American Elsevier Pub. Co., 1971.