Bossing, N. L. (1949). Principles of secondary education. Prentice-Hall, Inc.
Chicago (17e ed.) BronvermeldingBossing, Nelson L. Principles of Secondary Education. New York: Prentice-Hall, Inc, 1949.
MLA (9e ed.) BronvermeldingBossing, Nelson L. Principles of Secondary Education. Prentice-Hall, Inc, 1949.
Let op: Deze citaties zijn niet altijd 100% accuraat.