APA (7th ed.) Citation

Information Sources, Inc, & Koolish, R. K. (1986). Business software directory (3rd ed.). Information Sources, Inc..

Chicago Style (17th ed.) Citation

Information Sources, Inc, and Ruth K. Koolish. Business Software Directory. 3rd ed. Glenview, Ill.: Information Sources, Inc., 1986.

MLA (9th ed.) Citation

Information Sources, Inc, and Ruth K. Koolish. Business Software Directory. 3rd ed. Information Sources, Inc., 1986.

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