Cita APA (7th ed.)
Pettofrezo, A. J., & Armstrong, L. H. (1989). Finite mathematics. Orange Publishers.
Cita Chicago (17th ed.)
Pettofrezo, Anthony J., i Lee H. Armstrong. Finite Mathematics. Florida: Orange Publishers, 1989.
Cita MLA (9th ed.)
Pettofrezo, Anthony J., i Lee H. Armstrong. Finite Mathematics. Orange Publishers, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.