APA (7th ed.) Citation

Tracton, K. (1980). The most popular subroutines in BASIC. TAB Books.

Chicago Style (17th ed.) Citation

Tracton, Ken. The Most Popular Subroutines in BASIC. Blue Ridge Summit, Pa.: TAB Books, 1980.

MLA (8th ed.) Citation

Tracton, Ken. The Most Popular Subroutines in BASIC. TAB Books, 1980.