Citazione APA

Unruh, G. G., & Alexander, W. M. (1974). Innovations in secondary education (2nd. ed.). Holt Rinehart & Winston.

Stile di citazione Chicago

Unruh, Glenys G., e William M. Alexander. Innovations in Secondary Education. 2nd. ed. New York: Holt Rinehart & Winston, 1974.

Citazione MLA

Unruh, Glenys G., e William M. Alexander. Innovations in Secondary Education. 2nd. ed. Holt Rinehart & Winston, 1974.