Citazione Stile APA (7a Edizione)

Blum, L. A. (1980). Friendship, altruism and morality. Routledge.

Citazione stile Chigago Style (17a edizione)

Blum, Lawrence A. Friendship, Altruism and Morality. London: Routledge, 1980.

Citatione MLA (9a ed.)

Blum, Lawrence A. Friendship, Altruism and Morality. Routledge, 1980.