Frank, W. W., & Lapp, C. L. (1959). How to outsell the born salesman. The MacMillan Company.
Chicago Style aipamenaFrank, William W., and Charles L. Lapp. How to Outsell the Born Salesman. New York: The MacMillan Company, 1959.
MLA aipamenaFrank, William W., and Charles L. Lapp. How to Outsell the Born Salesman. The MacMillan Company, 1959.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.