Purpel, D. E. (1989). The moral & spiritual crisis in education: A curriculum for justice and compassion in education. Bergin & Garvey.
Chicago-referens (17:e uppl.)Purpel, David E. The Moral & Spiritual Crisis in Education: A Curriculum for Justice and Compassion in Education. Granby, Mass: Bergin & Garvey, 1989.
MLA-referens (9:e uppl.)Purpel, David E. The Moral & Spiritual Crisis in Education: A Curriculum for Justice and Compassion in Education. Bergin & Garvey, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.