Cita APA (7th ed.)

Silbert, J., Carnine, D., & Stein, M. (1990). Direct instruction mathematics (2nd edition.). Merrill Pub.

Cita Chicago (17th ed.)

Silbert, Jerry, Douglas Carnine, i Marcy Stein. Direct Instruction Mathematics. 2nd edition. Columbus, Ohio: Merrill Pub, 1990.

Cita MLA (9th ed.)

Silbert, Jerry, et al. Direct Instruction Mathematics. 2nd edition. Merrill Pub, 1990.