Hass, K. (1969). Creative salesmanship understanding essentials. George Press.
Style de citation Chicago (17e éd.)Hass, K. Creative Salesmanship Understanding Essentials. London: George Press, 1969.
Style de citation MLA (9e éd.)Hass, K. Creative Salesmanship Understanding Essentials. George Press, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.