Cita APA (7th ed.)

Proga, R. (1996). Arithmetic and algebra (4th.ed.). PWS.

Cita Chicago (17th ed.)

Proga, Rosanne. Arithmetic and Algebra. 4th.ed. Boston: PWS, 1996.

Cita MLA (9th ed.)

Proga, Rosanne. Arithmetic and Algebra. 4th.ed. PWS, 1996.