Παραπομπή σε μορφή APA (7η εκδ.)

Marcum, W. (1990). Youth ministry esentials: Six ready - to - use sessions to equip your volunteers. Group Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Marcum, Walt. Youth Ministry Esentials: Six Ready - to - Use Sessions to Equip Your Volunteers. Colorado: Group Books, 1990.

Παραπομπή σε μορφή MLA (9th εκδ.)

Marcum, Walt. Youth Ministry Esentials: Six Ready - to - Use Sessions to Equip Your Volunteers. Group Books, 1990.