APA
Stern N., . (1994). Structured COBOL programming 7th ed. [Place of publication not identified]: John Wiley & Sons.
Chicago
Stern Nancy, . 1994. Structured COBOL programming 7th ed. [Place of publication not identified]: John Wiley & Sons.
Harvard
Stern N., . (1994). Structured COBOL programming 7th ed. [Place of publication not identified]: John Wiley & Sons.
MLA
Stern Nancy, . Structured COBOL programming 7th ed. [Place of publication not identified]: John Wiley & Sons. 1994.