McMahon, E., & Jamison, W. (1989). Ed McMahon's superselling: Performance techniques for high volume sales. Prentice Hall.
Chicago Style (17. basım) AtıfMcMahon, Ed, ve Warren Jamison. Ed McMahon's Superselling: Performance Techniques for High Volume Sales. New York: Prentice Hall, 1989.
MLA (9th ed.) AtıfMcMahon, Ed, ve Warren Jamison. Ed McMahon's Superselling: Performance Techniques for High Volume Sales. Prentice Hall, 1989.
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