APA (7e ed.) Bronvermelding

Collis, M. (1974). Tackling problems part 1: A unit for teachers. Macdonald Educational.

Chicago (17e ed.) Bronvermelding

Collis, Margaret. Tackling Problems Part 1: A Unit for Teachers. London: Macdonald Educational, 1974.

MLA (9e ed.) Bronvermelding

Collis, Margaret. Tackling Problems Part 1: A Unit for Teachers. Macdonald Educational, 1974.

Let op: Deze citaties zijn niet altijd 100% accuraat.