Cita APA (7a ed.)

Stern, N. B. A., Stern, R. A. C., & Ley, J. P. C. (2006). COBOL for the 21st century (11th ed.). John Wiley & Sons.

Cita Chicago Style (17a ed.)

Stern, Nancy B Author, Robert A Contributor Stern, y James P Contributor Ley. COBOL for the 21st Century. 11th ed. [Place of publication not identified]: John Wiley & Sons, 2006.

Cita MLA (9a ed.)

Stern, Nancy B Author, et al. COBOL for the 21st Century. 11th ed. John Wiley & Sons, 2006.