O'Brien, R., & Soderman, J. (1975). The Basic guide to research sources. New American Library.
Chicago Style (17. basım) AtıfO'Brien, Robert, ve Joanne Soderman. The Basic Guide to Research Sources. New York: New American Library, 1975.
MLA (9th ed.) AtıfO'Brien, Robert, ve Joanne Soderman. The Basic Guide to Research Sources. New American Library, 1975.
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