APA

Pandis N., . (20120717). Sample calculations for comparing proportions. : 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

Pandis Nikolaos, . 20120717. Sample calculations for comparing proportions. : 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

Pandis N., . (20120717). Sample calculations for comparing proportions. : 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

Pandis Nikolaos, . Sample calculations for comparing proportions. : American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics. 20120717.