Ferreira, Leslie Piccolotto; de Oliveira Latorre, Maria do Rosario Dias; Pinto Giannini, Susana Pimentel; et al. (January 2010). "Influence of Abusive Vocal Habits, Hydration, Mastication, and Sleep in the Occurrence of Vocal Symptoms in Teachers". Journal of Voice. 24 (1): 86–92. doi:10.1016/j.jvoice.2008.06.001. PMID19135852.
Rowell, V. R.; Rack, Philip H. (2014). "Health Education Needs of a Minority Ethnic Group". Journal of the Institute of Health Education. 17 (4): 3–19. doi:10.1080/03073289.1979.10805461. ISSN0307-3289.
Osler, William (1925). Aequanimitas (2 ed.). Philadelphia: P Blakiston's Son & Co. Archived from the original on 2016-02-11 – via Johns Hopkins University Medical Archives.
Uzokwe, Alfred Obiora (2 May 2005). "In desperate need of a national airline (part 1)". Nigeriaworld. Retrieved 12 Dec 2020. After ruminating the issue for a while, he decided not to swallow phlegm in the name of decorum and so he called some of his friends.
Ferreira, Leslie Piccolotto; de Oliveira Latorre, Maria do Rosario Dias; Pinto Giannini, Susana Pimentel; et al. (January 2010). "Influence of Abusive Vocal Habits, Hydration, Mastication, and Sleep in the Occurrence of Vocal Symptoms in Teachers". Journal of Voice. 24 (1): 86–92. doi:10.1016/j.jvoice.2008.06.001. PMID19135852.
Osler, William (1925). Aequanimitas (2 ed.). Philadelphia: P Blakiston's Son & Co. Archived from the original on 2016-02-11 – via Johns Hopkins University Medical Archives.
Rowell, V. R.; Rack, Philip H. (2014). "Health Education Needs of a Minority Ethnic Group". Journal of the Institute of Health Education. 17 (4): 3–19. doi:10.1080/03073289.1979.10805461. ISSN0307-3289.