Langs, R. (1998). Ground rules in psychotherapy and counselling. Karnac Books.
Style de citation Chicago (17e éd.)Langs, Robert. Ground Rules in Psychotherapy and Counselling. London: Karnac Books, 1998.
Style de citation MLA (8e éd.)Langs, Robert. Ground Rules in Psychotherapy and Counselling. Karnac Books, 1998.
Attention : ces citations peuvent ne pas être correctes à 100%.