APA
Greco P. M., . (20140520). It takes courage. : American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.
Chicago
Greco Peter M, . 20140520. It takes courage. : American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.
Harvard
Greco P. M., . (20140520). It takes courage. : American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.
MLA
Greco Peter M, . It takes courage. : American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics. 20140520.