American Cancer Society. (2014, July 16). Oral Cavity and Oropharyngeal Cancer. Retrieved from: https://www.cancer.org/cancer/oral-cavity-and-oropharyngeal-cancer.html.
Brierley JD, Gospodarowicz MK, Wittekind C (eds.). (2017). TNM Classification of Malignant Tumours. (8th Edition). Wiley Blackwell.
National Cancer Institute. (2017, April 21). Oropharyngeal Cancer Treatment (PDQ®) Health Professional Version. Retrieved from: https://www.cancer.gov/types/head-and-neck/hp/oropharyngeal-treatment-pdq#section/all.×