Cita APA (7a ed.)

Haddock, F. C. (1911). The Will in Salesmanship. National School of Salesmanship.

Cita Chicago Style (17a ed.)

Haddock, Frank Channing. The Will in Salesmanship. Minneapolis: National School of Salesmanship, 1911.

Cita MLA (9a ed.)

Haddock, Frank Channing. The Will in Salesmanship. National School of Salesmanship, 1911.