NAPS THOMAS L. (1982). COBOL: A COMPREHENSIVE TREATMENT. RESTON PUBLISHERS.
Chicago-čujuhus (17. p.)NAPS THOMAS L. COBOL: A COMPREHENSIVE TREATMENT. VIRGINIA: RESTON PUBLISHERS, 1982.
MLA-čujuhus (9. p.)NAPS THOMAS L. COBOL: A COMPREHENSIVE TREATMENT. RESTON PUBLISHERS, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.