APA (7e ed.) Bronvermelding
Langs, R. (1998). Ground rules in psychotherapy and counselling. Karnac Books.
Chicago (17e ed.) Bronvermelding
Langs, Robert. Ground Rules in Psychotherapy and Counselling. London: Karnac Books, 1998.
MLA (9e ed.) Bronvermelding
Langs, Robert. Ground Rules in Psychotherapy and Counselling. Karnac Books, 1998.
Let op: Deze citaties zijn niet altijd 100% accuraat.