Cita APA

Duffy, M., Averill, P. M., Bartels, S. J., Bell, I. R., Bredin, J., Brockway, J. A., . . . Dupree, L. W. (1999). Handbook of counseling and psychotherapy with older adults. New York: John Wiley & Sons, Inc..

Citación estilo Chicago

Duffy, Michael, et al. Handbook of Counseling and Psychotherapy With Older Adults. New York: John Wiley & Sons, Inc., 1999.

Cita MLA

Duffy, Michael, et al. Handbook of Counseling and Psychotherapy With Older Adults. New York: John Wiley & Sons, Inc., 1999.