APA (7th ed.) Citation

Bergin, J. (1997). Karel++: A gentle introduction to the art of object-oriented programming. John Wiley & Sons.

Chicago Style (17th ed.) Citation

Bergin, Joseph. Karel++: A Gentle Introduction to the Art of Object-oriented Programming. New York: John Wiley & Sons, 1997.

MLA (9th ed.) Citation

Bergin, Joseph. Karel++: A Gentle Introduction to the Art of Object-oriented Programming. John Wiley & Sons, 1997.

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