Cita APA (7a ed.)

Schools Council, Nuffield Foundation, Nuffield Foundation, & Scottish Education Department. (1973). Trees; stages 1 and 2: A unit for teachers. MacDonald Educational.

Cita Chicago Style (17a ed.)

Schools Council, Nuffield Foundation, Nuffield Foundation, y Scottish Education Department. Trees; Stages 1 and 2: A Unit for Teachers. London: MacDonald Educational, 1973.

Cita MLA (9a ed.)

Schools Council, Nuffield Foundation, et al. Trees; Stages 1 and 2: A Unit for Teachers. MacDonald Educational, 1973.