Knellwolf, C., & Norris, C. (2001). Twentieth-century historical, philosophical and psychological perspectives. Cambridge Univ. Press.

Knellwolf, Christa, and Christopher Norris. Twentieth-century Historical, Philosophical and Psychological Perspectives. Cambridge [u.a.]: Cambridge Univ. Press, 2001.

Knellwolf, Christa, and Christopher Norris. Twentieth-century Historical, Philosophical and Psychological Perspectives. Cambridge Univ. Press, 2001.