PC Software Interest Group (Sunnyvale, Calif.). (1991). The PC-SIG encyclopedia of shareware: A comprehensive guide to low-cost software for IBM and compatibles (4th. ed.). PC-SIG.
Citace podle Chicago (17th ed.)PC Software Interest Group (Sunnyvale, Calif.). The PC-SIG Encyclopedia of Shareware: A Comprehensive Guide to Low-cost Software for IBM and Compatibles. 4th. ed. Sunnyvale, Calif.: PC-SIG, 1991.
Citace podle MLA (8th ed.)PC Software Interest Group (Sunnyvale, Calif.). The PC-SIG Encyclopedia of Shareware: A Comprehensive Guide to Low-cost Software for IBM and Compatibles. 4th. ed. PC-SIG, 1991.
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