Παραπομπή σε μορφή APA (7η εκδ.)

Purpel, D. E. (1989). The moral & spiritual crisis in education: A curriculum for justice and compassion in education. Bergin & Garvey.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Purpel, David E. The Moral & Spiritual Crisis in Education: A Curriculum for Justice and Compassion in Education. Granby, Mass: Bergin & Garvey, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Purpel, David E. The Moral & Spiritual Crisis in Education: A Curriculum for Justice and Compassion in Education. Bergin & Garvey, 1989.