Não informado. (1953). Improving College and University Teaching. Heldref Publications.
Chicago-Zitierstil (17. Ausg.)Não informado. Improving College and University Teaching. Washington: Heldref Publications, 1953.
MLA-Zitierstil (8. Ausg.)Não informado. Improving College and University Teaching. Heldref Publications, 1953.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.