Cita APA (7a ed.)

Collins, J., & Collins, M. (1992). Social skills training and the professional helper. John Wiley & Sons.

Cita Chicago Style (17a ed.)

Collins, John, y Mary Collins. Social Skills Training and the Professional Helper. Chichester [etc.]: John Wiley & Sons, 1992.

Cita MLA (9a ed.)

Collins, John, y Mary Collins. Social Skills Training and the Professional Helper. John Wiley & Sons, 1992.