APA-viite (7. p.)
Zawisza, K., & et al. (2015). Sleep duration and mortality among older adults in a 22-year follow-up study: An analysis of possible effect modifiers.
Chicago-viite (17. p.)
Zawisza, K., ja et al. Sleep Duration and Mortality Among Older Adults in a 22-year Follow-up Study: An Analysis of Possible Effect Modifiers. 2015.
MLA-viite (9. p.)
Zawisza, K., ja et al. Sleep Duration and Mortality Among Older Adults in a 22-year Follow-up Study: An Analysis of Possible Effect Modifiers. 2015.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.