Não informado. (1970). Challenge in Educational Administration. Alberta Teachers Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Challenge in Educational Administration. Edmonton, Canada: Alberta Teachers Association, 1970.
MLA-Zitierstil (8. Ausg.)Não informado. Challenge in Educational Administration. Alberta Teachers Association, 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.