APA (7th ed.) Citation

Pattis, R. E. (1981). Karel the robot: A gentle introduction to the art of programming with pascal. John Wiley.

Chicago Style (17th ed.) Citation

Pattis, Richard E. Karel the Robot: A Gentle Introduction to the Art of Programming with Pascal. New York: John Wiley, 1981.

MLA (9th ed.) Citation

Pattis, Richard E. Karel the Robot: A Gentle Introduction to the Art of Programming with Pascal. John Wiley, 1981.

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