AFT, L. S. (1992). Productivity Measurement & Improvement / Lawrence S. Aft. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)AFT, Lawrence S. Productivity Measurement & Improvement / Lawrence S. Aft. Prentice Hall, 1992.
Lua MLA (8ú heag.)AFT, Lawrence S. Productivity Measurement & Improvement / Lawrence S. Aft. Prentice Hall, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.