APA (7th ed.) Citation

Sack, J. R., & Gabriel, J. M. (1973). Entering BASIC. Science Research Associates.

Chicago Style (17th ed.) Citation

Sack, John R., and Judith Meadows Gabriel. Entering BASIC. Chicago: Science Research Associates, 1973.

MLA (8th ed.) Citation

Sack, John R., and Judith Meadows Gabriel. Entering BASIC. Science Research Associates, 1973.

Warning: These citations may not always be 100% accurate.