Gaya APA

Trapp, K, H, W, C. (1999). Instructor's Resource Manual For Chemical Principles (3). USA Amerika Serikat: W.H. Freeman and Company.

Gaya MLA

Trapp, Kenton, H., Whitmire,, Charles. "Instructor's Resource Manual For Chemical Principles". 3 USA Amerika Serikat: W.H. Freeman and Company, 1999. Text.