Phelps, D. M. (1957). Rubber developments in Latin America. Bureau of Business Research.
Chicago Style (17. basım) AtıfPhelps, Dudley Maynard. Rubber Developments in Latin America. Ann Arbor: Bureau of Business Research, 1957.
MLA (9th ed.) AtıfPhelps, Dudley Maynard. Rubber Developments in Latin America. Bureau of Business Research, 1957.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..