Walsh, J. (1987). The manager`s problem solver. Spherell.
Lua i Stíl Chicago (17ú heag.)Walsh, John. The Manager`s Problem Solver. London: Spherell, 1987.
Lua MLA (9ú heag.)Walsh, John. The Manager`s Problem Solver. Spherell, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.