Gaya APA

Business essentials / Ronald J. Ebert ; Ricky W. Griffin. (2005). Upper Saddle River, NJ: Pearson Education, c.

Gaya MLA

Business essentials / Ronald J. Ebert ; Ricky W. Griffin. 4th ed.. Upper Saddle River, NJ: Pearson Education, c, 2005. Buku Wajib.