APA (7th ed.) Citation

Strachey, C. (1973). The varieties of programming language. Oxford University Computing Laboratory, Programming Research Group.

Chicago Style (17th ed.) Citation

Strachey, Christopher. The Varieties of Programming Language. Oxford: Oxford University Computing Laboratory, Programming Research Group, 1973.

MLA (8th ed.) Citation

Strachey, Christopher. The Varieties of Programming Language. Oxford University Computing Laboratory, Programming Research Group, 1973.

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