APA (7e ed.) Bronvermelding

Johnston, D. J. (1971). Teachers' in-service education. Pergamon Press.

Chicago (17e ed.) Bronvermelding

Johnston, David John. Teachers' In-service Education. Oxford: Pergamon Press, 1971.

MLA (9e ed.) Bronvermelding

Johnston, David John. Teachers' In-service Education. Pergamon Press, 1971.