Essentials of entrepreneurship and small business management / Thomas N. Zimmerer ; Norman M. Scarborough with Doug Wilson. (1969). Upper Saddle River, NJ: Pearson Education, c.
Essentials of entrepreneurship and small business management / Thomas N. Zimmerer ; Norman M. Scarborough with Doug Wilson. 5th ed.. Upper Saddle River, NJ: Pearson Education, c, 1969. Buku Wajib.