APA (7th ed.) Citation

Stoy, J., & Strachey, C. (1972). OS6, an operating system for a small computer.

Chicago Style (17th ed.) Citation

Stoy, Joseph, and Christopher Strachey. OS6, an Operating System for a Small Computer. Oxford, 1972.

MLA (9th ed.) Citation

Stoy, Joseph, and Christopher Strachey. OS6, an Operating System for a Small Computer. 1972.

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