APA (7th ed.) Citation

Conway, R., & Gries, D. (1973). An introduction to programming: A structured approach using PL/I and PL/C. Winthrop Publishers, Inc.

Chicago Style (17th ed.) Citation

Conway, Richard, and David Gries. An Introduction to Programming: A Structured Approach Using PL/I and PL/C. Cambridge MA: Winthrop Publishers, Inc, 1973.

MLA (8th ed.) Citation

Conway, Richard, and David Gries. An Introduction to Programming: A Structured Approach Using PL/I and PL/C. Winthrop Publishers, Inc, 1973.

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