APA (7th ed.) Citation
Spira, A., & ET AL. Reliability and validity of the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Scale in older men.
Chicago Style (17th ed.) Citation
Spira, A.P, and ET AL. Reliability and Validity of the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Scale in Older Men.
MLA (9th ed.) Citation
Spira, A.P, and ET AL. Reliability and Validity of the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Scale in Older Men.
Warning: These citations may not always be 100% accurate.