Cita APA (7a ed.)
Welter, P. (1978). How to help a friend. Tyndale House.
Cita Chicago Style (17a ed.)
Welter, Paul. How to Help a Friend. Wheaton, Ill: Tyndale House, 1978.
Cita MLA (9a ed.)
Welter, Paul. How to Help a Friend. Tyndale House, 1978.
Precaución: Estas citas no son 100% exactas.