APA (7th ed.) Citation

Gregory, R. T. (1980). Error-Free computation: Why it is needed and methods for doing it. R. Krieger.

Chicago Style (17th ed.) Citation

Gregory, Robert Todd. Error-Free Computation: Why It Is Needed and Methods for Doing It. New York: R. Krieger, 1980.

MLA (9th ed.) Citation

Gregory, Robert Todd. Error-Free Computation: Why It Is Needed and Methods for Doing It. R. Krieger, 1980.