Παραπομπή APA

Newcomer, L. R. (1987). Programming with advanced structured cobol. Mc Grahill.

Παραπομπή Chicago Style

Newcomer, Lawrence R. Programming with Advanced Structured Cobol. Singapore: Mc Grahill, 1987.

Παραπομπή MLA

Newcomer, Lawrence R. Programming with Advanced Structured Cobol. Mc Grahill, 1987.