Arnold, W. W., & Plas, J. M. (1993). The human touch: Today's most unusual program for productivity and profit. Wiley.
Lua i Stíl Chicago (17ú heag.)Arnold, William W., agus Jeanne M. Plas. The Human Touch: Today's Most Unusual Program for Productivity and Profit. New York: Wiley, 1993.
Lua MLA (8ú heag.)Arnold, William W., agus Jeanne M. Plas. The Human Touch: Today's Most Unusual Program for Productivity and Profit. Wiley, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.