Gaya APA
Christensen, L, B. (2007).
Experimental Methodology (10th Ed.).
Upper Saddle River, NJ:
Pearson Education Asia Pte, Ltd..
Gaya MLA
Christensen, Larry, B.
"Experimental Methodology".
10th Ed.
Upper Saddle River, NJ:
Pearson Education Asia Pte, Ltd.,
2007.
Text.