Clifford, S. H., Sawyer, S. C., & Stallings, W. D. (1990). Computers: The user perspective (2nd ed., Lotus ed.). Irwin.
Lua i Stíl Chicago (17ú heag.)Clifford, Sarah Hutchinson, Stacey C. Sawyer, agus Warren D. Stallings. Computers: The User Perspective. 2nd ed., Lotus ed. Homewood, IL: Irwin, 1990.
Lua MLA (8ú heag.)Clifford, Sarah Hutchinson, et al. Computers: The User Perspective. 2nd ed., Lotus ed. Irwin, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.