APA
Langille M., Veldhuyzen van Zanten S., Shanavaz S. & Massoud E. (20130129). Systematic evaluation of obstructive sleep apnea websites on the internet. : Journal of otolaryngology - head & neck surgery = Le Journal d'oto-rhino-laryngologie et de chirurgie cervico-faciale.
Chicago
Langille Morgan, Veldhuyzen van Zanten Sander, Shanavaz Shahryar-Ali and Massoud Emad. 20130129. Systematic evaluation of obstructive sleep apnea websites on the internet. : Journal of otolaryngology - head & neck surgery = Le Journal d'oto-rhino-laryngologie et de chirurgie cervico-faciale.
Harvard
Langille M., Veldhuyzen van Zanten S., Shanavaz S. and Massoud E. (20130129). Systematic evaluation of obstructive sleep apnea websites on the internet. : Journal of otolaryngology - head & neck surgery = Le Journal d'oto-rhino-laryngologie et de chirurgie cervico-faciale.
MLA
Langille Morgan, Veldhuyzen van Zanten Sander, Shanavaz Shahryar-Ali and Massoud Emad. Systematic evaluation of obstructive sleep apnea websites on the internet. : Journal of otolaryngology - head & neck surgery = Le Journal d'oto-rhino-laryngologie et de chirurgie cervico-faciale. 20130129.