Cita APA (7a ed.)

Ross, C. S., & Ross, M. M. (1980). Practical mathematics: Teacher's edition. Benefic Press.

Cita Chicago Style (17a ed.)

Ross, Charles S., y Mary M. Ross. Practical Mathematics: Teacher's Edition. Benefic Press, 1980.

Cita MLA (9a ed.)

Ross, Charles S., y Mary M. Ross. Practical Mathematics: Teacher's Edition. Benefic Press, 1980.