Cita APA (7a ed.)

Robinson, O. P. (1950). Successful retail salesmanship (2nd ed.). Prentice-Hall.

Cita Chicago Style (17a ed.)

Robinson, O. Preston. Successful Retail Salesmanship. 2nd ed. New York: Prentice-Hall, 1950.

Cita MLA (9a ed.)

Robinson, O. Preston. Successful Retail Salesmanship. 2nd ed. Prentice-Hall, 1950.