APA (7th ed.) Citation

Ashlock, R. B. (1972). Error patterns in computation: A semi-programmed approach. Merrill.

Chicago Style (17th ed.) Citation

Ashlock, Robert B. Error Patterns in Computation: A Semi-programmed Approach. Columbus, OH: Merrill, 1972.

MLA (9th ed.) Citation

Ashlock, Robert B. Error Patterns in Computation: A Semi-programmed Approach. Merrill, 1972.