Heidhues, T., Haen, H. d., Johnson, G. L., & Tangermann, S. (1985). Agriculture and international relations: Analysis and policy : essays in memory of Theodor Heidhues. St. Martin's Press.
Chicago-referens (17:e uppl.)Heidhues, Theodor, Hartwig de Haen, Glenn Leroy Johnson, och Stefan Tangermann. Agriculture and International Relations: Analysis and Policy : Essays in Memory of Theodor Heidhues. New York: St. Martin's Press, 1985.
MLA-referens (9:e uppl.)Heidhues, Theodor, et al. Agriculture and International Relations: Analysis and Policy : Essays in Memory of Theodor Heidhues. St. Martin's Press, 1985.
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