MCGRACKEN DANIEL D. (1976). SIMPLIFIED GUIDE TO STRUCTURED COBOL PROGRAMMING. JOHN WILEY AND SONS.
Lua i Stíl Chicago (17ú heag.)MCGRACKEN DANIEL D. SIMPLIFIED GUIDE TO STRUCTURED COBOL PROGRAMMING. NEW YORK: JOHN WILEY AND SONS, 1976.
Lua MLA (9ú heag.)MCGRACKEN DANIEL D. SIMPLIFIED GUIDE TO STRUCTURED COBOL PROGRAMMING. JOHN WILEY AND SONS, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.