Dyfyniad APA

London Centre for Psychotherapy, ebrary, Inc, & Bishop, B. (2002). Challenges to practice. Karnac.

Dyfyniad Arddull Chicago

London Centre for Psychotherapy, Inc ebrary, and Bernardine Bishop. Challenges to Practice. London ; New York: Karnac, 2002.

Dyfyniad MLA

London Centre for Psychotherapy, et al. Challenges to Practice. Karnac, 2002.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.