Marsh, U. G. (1972). Salesmanship: Modern principles and practise. Prentice-Hall of India.
Chicago Style aipamenaMarsh, U. Grant. Salesmanship: Modern Principles and Practise. New Jersey: Prentice-Hall of India, 1972.
MLA aipamenaMarsh, U. Grant. Salesmanship: Modern Principles and Practise. Prentice-Hall of India, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.