Παραπομπή APA

Lang, G. (1990). Personal conversations: Roles and skills for counsellors.

Παραπομπή Chicago Style

Lang, Gerrit. Personal Conversations: Roles and Skills for Counsellors. London, Routledge, 1990.

Παραπομπή MLA

Lang, Gerrit. Personal Conversations: Roles and Skills for Counsellors. 1990.