APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Stern, Nancy B., Robert A. Stern, and James P. Ley. COBOL for the 21st Century. 11. ed. Hoboken, NJ: Wiley, 2006.

MLA (9th ed.) Citation

Stern, Nancy B., et al. COBOL for the 21st Century. 11. ed. Wiley, 2006.