APA (7th ed.) Citation

Gookin, D. (1990). The ABC's of upgrading your PC. Tech Publications.

Chicago Style (17th ed.) Citation

Gookin, Dan. The ABC's of Upgrading Your PC. Singapore: Tech Publications, 1990.

MLA (9th ed.) Citation

Gookin, Dan. The ABC's of Upgrading Your PC. Tech Publications, 1990.