Lengnick-Hall, C. A., & Hartman, M. G. (1995). Experiencing quality. Dryden Press.
Lua i Stíl Chicago (17ú heag.)Lengnick-Hall, Cynthia A., agus Melissa G. Hartman. Experiencing Quality. Fort Worth, Conn: Dryden Press, 1995.
Lua MLA (9ú heag.)Lengnick-Hall, Cynthia A., agus Melissa G. Hartman. Experiencing Quality. Dryden Press, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.