Cita APA (7th ed.)

Hass, K. (1969). Creative salesmanship understanding essentials. George Press.

Cita Chicago (17th ed.)

Hass, K. Creative Salesmanship Understanding Essentials. London: George Press, 1969.

Cita MLA (9th ed.)

Hass, K. Creative Salesmanship Understanding Essentials. George Press, 1969.