Citazione Stile APA (7a Edizione)

Hallerberg, A. E. (1974). Mathematical proof: An elementary approach. Hafner Press.

Citazione stile Chigago Style (17a edizione)

Hallerberg, Arthur E. Mathematical Proof: An Elementary Approach. New York: Hafner Press, 1974.

Citatione MLA (9a ed.)

Hallerberg, Arthur E. Mathematical Proof: An Elementary Approach. Hafner Press, 1974.