Παραπομπή σε μορφή APA (7η εκδ.)

Herbert, M. (1990). Planning a research project: A guide for practitioners and trainees in the helping professions. Cassell.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Herbert, Martin. Planning a Research Project: A Guide for Practitioners and Trainees in the Helping Professions. London: Cassell, 1990.

Παραπομπή σε μορφή MLA (9th εκδ.)

Herbert, Martin. Planning a Research Project: A Guide for Practitioners and Trainees in the Helping Professions. Cassell, 1990.