Cita APA (7th ed.)

Gibson, A., & Clarke, G. (1995). Project-based group work facilitator's manual: Young people, youth workers and projects. Jessica Kingsley.

Cita Chicago (17th ed.)

Gibson, Andy, i Gaynor Clarke. Project-based Group Work Facilitator's Manual: Young People, Youth Workers and Projects. London: Jessica Kingsley, 1995.

Cita MLA (9th ed.)

Gibson, Andy, i Gaynor Clarke. Project-based Group Work Facilitator's Manual: Young People, Youth Workers and Projects. Jessica Kingsley, 1995.