Willis, D. O. (2013). Business basics for dentists. John Wiley & Sons Ltd. https://doi.org/10.1002/9781118783368
Cita Chicago (17th ed.)Willis, David O. Business Basics for Dentists. Hoboken, New Jersey: John Wiley & Sons Ltd, 2013. https://doi.org/10.1002/9781118783368.
Cita MLA (9th ed.)Willis, David O. Business Basics for Dentists. John Wiley & Sons Ltd, 2013. https://doi.org/10.1002/9781118783368.
Atenció: Aquestes cites poden no estar 100% correctes.