Bills, L. G., & Helgerson, L. W. (1988). User Interfaces for CD-ROM PACs.
Chicago Style (17th ed.) CitationBills, Linda G., and Linda W. Helgerson. User Interfaces for CD-ROM PACs. 1988.
MLA (9th ed.) CitationBills, Linda G., and Linda W. Helgerson. User Interfaces for CD-ROM PACs. 1988.
Warning: These citations may not always be 100% accurate.