APA Style

Gravetter, F, J., Forzano, L, B. (2018). Research methods for the behavioral sciences. Sixth Edition (Sixth Edition). Boston: Cengage.

MLA Style

Gravetter, Frederick, J.., Forzano, Lori-Ann, B.. "Research methods for the behavioral sciences. Sixth Edition". Sixth Edition Boston: Cengage, 2018. Text.