APA (7th ed.) Zitazioa
ebrary, Inc, & Cowell, H. A. (2011). Physical activity guidelines for Americans and a review of scientific literature used. Nova Science Publishers.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, eta Hailey A. Cowell. Physical Activity Guidelines for Americans and a Review of Scientific Literature Used. Hauppauge, N.Y.: Nova Science Publishers, 2011.
MLA (9th ed.) Zitazioa
ebrary, Inc, eta Hailey A. Cowell. Physical Activity Guidelines for Americans and a Review of Scientific Literature Used. Nova Science Publishers, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.