Watson, T. j. P. (1990). Father Son & Co. Business Plus.
Lua i Stíl Chicago (17ú heag.)Watson, Thomas j; Petre. Father Son & Co. New York: Business Plus, 1990.
Lua MLA (9ú heag.)Watson, Thomas j; Petre. Father Son & Co. Business Plus, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.