Caldwell, I. S. (1959). The organizing principle in the curriculum of Christian education: Protestant trends.
Chicago-Zitierstil (17. Ausg.)Caldwell, Irene Smith. The Organizing Principle in the Curriculum of Christian Education: Protestant Trends. 1959.
MLA-Zitierstil (8. Ausg.)Caldwell, Irene Smith. The Organizing Principle in the Curriculum of Christian Education: Protestant Trends. 1959.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.