Cita APA (7a ed.)
Collins, G. R. (1976). How to be a people helper. Vision House Publishers.
Cita Chicago Style (17a ed.)
Collins, Gary R. How to Be a People Helper. Santa Ana, Calif.: Vision House Publishers, 1976.
Cita MLA (9a ed.)
Collins, Gary R. How to Be a People Helper. Vision House Publishers, 1976.
Precaución: Estas citas no son 100% exactas.