Cita APA (7th ed.)
Proga, R. (1995). Basic mathematics (4th ed.). PWS Pub. Co..
Cita Chicago (17th ed.)
Proga, Rosanne. Basic Mathematics. 4th ed. Boston: PWS Pub. Co., 1995.
Cita MLA (9th ed.)
Proga, Rosanne. Basic Mathematics. 4th ed. PWS Pub. Co., 1995.
Atenció: Aquestes cites poden no estar 100% correctes.