APA (7th ed.) Zitazioa
Bryman, A., & Foster, L. (2004). Social Research Methods (2nd ed.). Oxford University.
Chicago Style (17th ed.) Zitazioa
Bryman, Alan, eta Liam Foster. Social Research Methods. 2nd ed. New York: Oxford University, 2004.
MLA (9th ed.) Zitazioa
Bryman, Alan, eta Liam Foster. Social Research Methods. 2nd ed. Oxford University, 2004.
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