Clark, J. B. (1987). Marketing today: Successes, failures and turnarounds. Prentice-Hall.
Cita Chicago (17th ed.)Clark, John B. Marketing Today: Successes, Failures and Turnarounds. Englewood Cliffs, New Jersey: Prentice-Hall, 1987.
Cita MLA (9th ed.)Clark, John B. Marketing Today: Successes, Failures and Turnarounds. Prentice-Hall, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.