APA

Hanan M., Karp P., . (1989). Customer satisfaction: how to maximize, measure, and market your company's "ultimate product". New York: American Management Association.

Chicago

Hanan Mack, Karp Peter, . 1989. Customer satisfaction: how to maximize, measure, and market your company's "ultimate product". New York: American Management Association.

Harvard

Hanan M., Karp P., . (1989). Customer satisfaction: how to maximize, measure, and market your company's "ultimate product". New York: American Management Association.

MLA

Hanan Mack, Karp Peter, . Customer satisfaction: how to maximize, measure, and market your company's "ultimate product". New York: American Management Association. 1989.