APA (7e ed.) Bronvermelding

Costa, G. d. l. (1965). Interviewing: Its skills & techniques, case records and discussion guides. Social Welfare Board, SWA UNICEF Assisted Social Services Project.

Chicago (17e ed.) Bronvermelding

Costa, Grace de la. Interviewing: Its Skills & Techniques, Case Records and Discussion Guides. [Manila]: Social Welfare Board, SWA UNICEF Assisted Social Services Project, 1965.

MLA (9e ed.) Bronvermelding

Costa, Grace de la. Interviewing: Its Skills & Techniques, Case Records and Discussion Guides. Social Welfare Board, SWA UNICEF Assisted Social Services Project, 1965.