Gaya APA

Zimmerer, T, W. et al (2008). Essentials of entrepreneurship and small business management (5th ed). Upper Saddle River, NJ: Pearson Prentice Hall.

Gaya MLA

Zimmerer, Thomas, W.. et al. "Essentials of entrepreneurship and small business management". 5th ed Upper Saddle River, NJ: Pearson Prentice Hall, 2008. Text.