APA (7th ed.) Citation

Information Sources, Inc. (1986). Business software directory. Information Sources, Inc..

Chicago Style (17th ed.) Citation

Information Sources, Inc. Business Software Directory. Glenview, Ill.: Information Sources, Inc., 1986.

MLA (9th ed.) Citation

Information Sources, Inc. Business Software Directory. Information Sources, Inc., 1986.

Warning: These citations may not always be 100% accurate.