APA (7th ed.) Citation

Parkin, A., & Yorke, R. (1996). COBOL for students (4th ed.). Arnold.

Chicago Style (17th ed.) Citation

Parkin, Andrew, and Richard Yorke. COBOL for Students. 4th ed. London: Arnold, 1996.

MLA (9th ed.) Citation

Parkin, Andrew, and Richard Yorke. COBOL for Students. 4th ed. Arnold, 1996.

Warning: These citations may not always be 100% accurate.