Cita APA (7th ed.)

Robbins, J. (1987). Mastering DOS (2nd ed.). Perfect Bound Pub., & Trading.

Cita Chicago (17th ed.)

Robbins, Judd. Mastering DOS. 2nd ed. Quezon City: Perfect Bound Pub., & Trading, 1987.

Cita MLA (9th ed.)

Robbins, Judd. Mastering DOS. 2nd ed. Perfect Bound Pub., & Trading, 1987.