APA (7th ed.) Citation

Doke, E. R., & Hardgrave, B. C. (1998). An introduction to object COBOL. John Wiley & Sons.

Chicago Style (17th ed.) Citation

Doke, E. Reed, and Bill C. Hardgrave. An Introduction to Object COBOL. New York [etc.]: John Wiley & Sons, 1998.

MLA (9th ed.) Citation

Doke, E. Reed, and Bill C. Hardgrave. An Introduction to Object COBOL. John Wiley & Sons, 1998.