Cita APA (7a ed.)
Collins, G. R. (1995). How to be a people helper. Tyndale House Publishers.
Cita Chicago Style (17a ed.)
Collins, Gary R. How to Be a People Helper. Illinois: Tyndale House Publishers, 1995.
Cita MLA (9a ed.)
Collins, Gary R. How to Be a People Helper. Tyndale House Publishers, 1995.
Precaución: Estas citas no son 100% exactas.