Lua APA (7ú heag.)
Gravetter, F. J., & Forzano, L. B. (2018). Research methods for the behavioral sciences (6th ed.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)
Gravetter, Frederick J., agus Lori-Ann B. Forzano. Research Methods for the Behavioral Sciences. 6th ed. Australia: Cengage Learning, 2018.
Lua MLA (9ú heag.)
Gravetter, Frederick J., agus Lori-Ann B. Forzano. Research Methods for the Behavioral Sciences. 6th ed. Cengage Learning, 2018.
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