Cita APA (7th ed.)

Craven, R. (2002). Customer is king: How to exceed their expectations. Virgin Books.

Cita Chicago (17th ed.)

Craven, Robert. Customer Is King: How to Exceed Their Expectations. London: Virgin Books, 2002.

Cita MLA (9th ed.)

Craven, Robert. Customer Is King: How to Exceed Their Expectations. Virgin Books, 2002.