Anderson, V. E., & Gruhn, W. T. (1962). Principles and practices of secondary education (2d ed.). Ronald Press.
Chicago Style (17. basım) AtıfAnderson, Vernon Ellsworth, ve William Theodore Gruhn. Principles and Practices of Secondary Education. 2d ed. New York: Ronald Press, 1962.
MLA (9th ed.) AtıfAnderson, Vernon Ellsworth, ve William Theodore Gruhn. Principles and Practices of Secondary Education. 2d ed. Ronald Press, 1962.
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