APA (7th ed.) Citation

Schildt, H. (1991). DOS 5: Made easy. Jemma.

Chicago Style (17th ed.) Citation

Schildt, Herbert. DOS 5: Made Easy. Manila: Jemma, 1991.

MLA (9th ed.) Citation

Schildt, Herbert. DOS 5: Made Easy. Jemma, 1991.