APA (7th ed.) Citation

Popkin, G. S. (1985). Introductory structured COBOL programming (2nd ed.). Kent.

Chicago Style (17th ed.) Citation

Popkin, Gary S. Introductory Structured COBOL Programming. 2nd ed. Boston, Mass.: Kent, 1985.

MLA (9th ed.) Citation

Popkin, Gary S. Introductory Structured COBOL Programming. 2nd ed. Kent, 1985.

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