APA (7th ed.) Citation

Montada, L., & Bierhoff, H. (1991). Altruism in social systems. Hogrefe.

Chicago Style (17th ed.) Citation

Montada, Leo, and Hans-Werner Bierhoff. Altruism in Social Systems. Lewiston, NY Stuttgart [u.a.]: Hogrefe, 1991.

MLA (9th ed.) Citation

Montada, Leo, and Hans-Werner Bierhoff. Altruism in Social Systems. Hogrefe, 1991.