Cita APA (7a ed.)

Priestley, P., & MacGuire, J. (1983). Learning to help: Basic skills exercises. Tavistock.

Cita Chicago Style (17a ed.)

Priestley, Philip, y James MacGuire. Learning to Help: Basic Skills Exercises. London [etc.]: Tavistock, 1983.

Cita MLA (9a ed.)

Priestley, Philip, y James MacGuire. Learning to Help: Basic Skills Exercises. Tavistock, 1983.