MLA

Padel, Una, Rose Twidale, and John Porter. Hiv Education In Prisons : a Resource Book. London: Health Education Authority, 1992.

APA

Padel, U., Twidale, R., & Porter, J. (1992). HIV education in prisons : a resource book. London: Health Education Authority.

Chicago

Padel, Una, Rose Twidale, and John Porter. HIV Education In Prisons: A Resource Book. London: Health Education Authority, 1992.