Gaya APA

M.FUTRELL, C. et al (2019). ABC'S OF RELATIONSHIP SELLING THROUGH SERVICE (13). New York: MC GRAW HILL EDUCATION.

Gaya MLA

M.FUTRELL, CHARLES. et al. "ABC'S OF RELATIONSHIP SELLING THROUGH SERVICE". 13 New York: MC GRAW HILL EDUCATION, 2019. Text.