Gaya APA

Cohen, M, J., Campbell, J, N. (1995). Pain treatment centers at a crossroads: a practical and conceptual reappraisal . Seattle: IASP Press.

Gaya MLA

Cohen, Mitchell, J.M.., Campbell, James, N.. "Pain treatment centers at a crossroads: a practical and conceptual reappraisal". Seattle: IASP Press, 1995. Text.