Watson, T. j. P. (1990). Father Son & Co. Business Plus.
Cita Chicago (17th ed.)Watson, Thomas j; Petre. Father Son & Co. New York: Business Plus, 1990.
Cita MLA (9th ed.)Watson, Thomas j; Petre. Father Son & Co. Business Plus, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.