APA (7th ed.) Citation

Watkins, R. P. (1980). Computer problem solving. Robert E. Krieger.

Chicago Style (17th ed.) Citation

Watkins, R. P. Computer Problem Solving. Malabar: Robert E. Krieger, 1980.

MLA (9th ed.) Citation

Watkins, R. P. Computer Problem Solving. Robert E. Krieger, 1980.