Cita APA (7a ed.)

Heron, J. (1990). The facilitators' handbook. Kogan Page [etc.].

Cita Chicago Style (17a ed.)

Heron, John. The Facilitators' Handbook. London [etc.]: Kogan Page [etc.], 1990.

Cita MLA (9a ed.)

Heron, John. The Facilitators' Handbook. Kogan Page [etc.], 1990.