Collis, M. (1975). Ways and means: A unit for teachers. Macdonald Educational.
Citazione stile Chigago Style (17a edizione)Collis, Margaret. Ways and Means: A Unit for Teachers. London: Macdonald Educational, 1975.
Citatione MLA (9a ed.)Collis, Margaret. Ways and Means: A Unit for Teachers. Macdonald Educational, 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.