Gaya APA

Christensen, L, B., Johnson, R, B. (2015). RESEARCH METHODS, DESIGN, AND ANALYSIS (12th). New Jersey: PEARSON PRENTICE HALL.

Gaya MLA

Christensen, Larry, B.., Johnson, R., Burke. "RESEARCH METHODS, DESIGN, AND ANALYSIS". 12th New Jersey: PEARSON PRENTICE HALL, 2015. Text.