APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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