APA (7th ed.) Citation

Riley, D. D. (1987). Using Modula-2: An introduction to computer science I. Boyd & Fraser Pub. Co..

Chicago Style (17th ed.) Citation

Riley, David D. Using Modula-2: An Introduction to Computer Science I. Boston: Boyd & Fraser Pub. Co., 1987.

MLA (8th ed.) Citation

Riley, David D. Using Modula-2: An Introduction to Computer Science I. Boyd & Fraser Pub. Co., 1987.