Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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