APA (7th ed.) Citation

Bull, G. M., Freeman, W., & Garland, S. J. (1973). Specification for standard BASIC. NCC Publications.

Chicago Style (17th ed.) Citation

Bull, Gordon M., W. Freeman, and Stephen J. Garland. Specification for Standard BASIC. Manchester [u.a.]: NCC Publications, 1973.

MLA (9th ed.) Citation

Bull, Gordon M., et al. Specification for Standard BASIC. NCC Publications, 1973.