APA

Elling K. A., . (1969). Introduction to modern marketing: an applied approach. New York: Macmillan.

Chicago

Elling Karl A, . 1969. Introduction to modern marketing: an applied approach. New York: Macmillan.

Harvard

Elling K. A., . (1969). Introduction to modern marketing: an applied approach. New York: Macmillan.

MLA

Elling Karl A, . Introduction to modern marketing: an applied approach. New York: Macmillan. 1969.