Citazione Stile APA (7a Edizione)

COHN, P. (1971). Free rings and their relations. Academic Pr..

Citazione stile Chigago Style (17a edizione)

COHN, P.M. Free Rings and Their Relations. London: Academic Pr., 1971.

Citatione MLA (9a ed.)

COHN, P.M. Free Rings and Their Relations. Academic Pr., 1971.