APA (7th ed.) Zitazioa
Kettley, N. C. (2010). Theory building in educational research. Continuum International Pub. Group.
Chicago Style (17th ed.) Zitazioa
Kettley, Nigel C. Theory Building in Educational Research. New York: Continuum International Pub. Group, 2010.
MLA (9th ed.) Zitazioa
Kettley, Nigel C. Theory Building in Educational Research. Continuum International Pub. Group, 2010.
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