Citazione Stile APA (7a Edizione)

Penner, T., & Kraut, R. (1989). Nature, knowledge and virtue: Essays in memory of Joan Kung. Academic Printing and Publishing.

Citazione stile Chigago Style (17a edizione)

Penner, Terry, e Richard Kraut. Nature, Knowledge and Virtue: Essays in Memory of Joan Kung. Edmonton: Academic Printing and Publishing, 1989.

Citatione MLA (9a ed.)

Penner, Terry, e Richard Kraut. Nature, Knowledge and Virtue: Essays in Memory of Joan Kung. Academic Printing and Publishing, 1989.