APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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