APA (7th ed.) Zitazioa
Engelhart, M. D. (1972). Methods of educational research. Rand McNally.
Chicago Style (17th ed.) Zitazioa
Engelhart, Max Dissette. Methods of Educational Research. Chicago: Rand McNally, 1972.
MLA (9th ed.) Zitazioa
Engelhart, Max Dissette. Methods of Educational Research. Rand McNally, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.