एपीए उद्धरण

Sæterdal, I., Underland, V., & Nilsen, E. S. (2012). The Effect of Probiotics for Preventing Acute Upper Respiratory Tract Infections. Global Advances in Health and Medicine.

शिकागो स्टाइल उद्धरण

Sæterdal, Ingvil, Vigdis Underland, और Elin Strømme Nilsen. The Effect of Probiotics for Preventing Acute Upper Respiratory Tract Infections. Global Advances in Health and Medicine, 2012.

एमएलए उद्धरण

Sæterdal, Ingvil, Vigdis Underland, और Elin Strømme Nilsen. The Effect of Probiotics for Preventing Acute Upper Respiratory Tract Infections. Global Advances in Health and Medicine, 2012.