Cita APA (7th ed.)

SILK ALVIN J. (2006). WHAT IS MARKETING. HARVARD BUSINESS SCHOOL PRESS.

Cita Chicago (17th ed.)

SILK ALVIN J. WHAT IS MARKETING. BOSTON: HARVARD BUSINESS SCHOOL PRESS, 2006.

Cita MLA (9th ed.)

SILK ALVIN J. WHAT IS MARKETING. HARVARD BUSINESS SCHOOL PRESS, 2006.