Dyfyniad APA

Andersen, M. L., & Tufik, S. (2012). Vitamin D as an Underlying Factor in Sleep-Related Issues. American Academy of Sleep Medicine.

Dyfyniad Arddull Chicago

Andersen, Monica Levy, and Sergio Tufik. Vitamin D As an Underlying Factor in Sleep-Related Issues. American Academy of Sleep Medicine, 2012.

Dyfyniad MLA

Andersen, Monica Levy, and Sergio Tufik. Vitamin D As an Underlying Factor in Sleep-Related Issues. American Academy of Sleep Medicine, 2012.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.