APA (7th ed.) Citation

Almeida, O., Alfonso, H., Yeap, B., Hankey, G., & Flicker, L. (2011). Complaints of difficulty to fall asleep increase the risk of depression in later life: The health in men study.

Chicago Style (17th ed.) Citation

Almeida, O., Helman Alfonso, B. Yeap, G. Hankey, and L. Flicker. Complaints of Difficulty to Fall Asleep Increase the Risk of Depression in Later Life: The Health in Men Study. 2011.

MLA (9th ed.) Citation

Almeida, O., et al. Complaints of Difficulty to Fall Asleep Increase the Risk of Depression in Later Life: The Health in Men Study. 2011.