Marcum, W. (1990). Youth ministry esentials: Six ready - to - use sessions to equip your volunteers. Group Books.
Cita Chicago (17th ed.)Marcum, Walt. Youth Ministry Esentials: Six Ready - to - Use Sessions to Equip Your Volunteers. Colorado: Group Books, 1990.
Cita MLA (9th ed.)Marcum, Walt. Youth Ministry Esentials: Six Ready - to - Use Sessions to Equip Your Volunteers. Group Books, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.