Yerker, L. (2011). Fun work. Tata Mcgraw Hill.
Cita Chicago (17th ed.)Yerker, Leslie. Fun Work. New Delhi: Tata Mcgraw Hill, 2011.
Cita MLA (9th ed.)Yerker, Leslie. Fun Work. Tata Mcgraw Hill, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.