Welburn, T. (1983). Advanced structured COBOL: Batch, on-line, and data-base concepts.
Cita Chicago Style (17a ed.)Welburn, Tyler. Advanced Structured COBOL: Batch, On-line, and Data-base Concepts. 1983.
Cita MLA (9a ed.)Welburn, Tyler. Advanced Structured COBOL: Batch, On-line, and Data-base Concepts. 1983.
Precaución: Estas citas no son 100% exactas.