Wolff, J. Marketing for Entrepreneurs (1.). Pearson Education UK.
Cita Chicago (17th ed.)Wolff, Jurgen. Marketing for Entrepreneurs. 1. Pearson Education UK.
Cita MLA (8th ed.)Wolff, Jurgen. Marketing for Entrepreneurs. 1. Pearson Education UK.
Atenció: Aquestes cites poden no estar 100% correctes.