APA način citiranja

Petry, N. M., Andrade, L. F., Barry, D., & Byrne, S. (2013). A randomized study of reinforcing ambulatory exercise in older adults.

Čikaški stil citiranja

Petry, Nancy M., Leonardo F. Andrade, Danielle Barry, i Shannon Byrne. A Randomized Study of Reinforcing Ambulatory Exercise in Older Adults. 2013.

MLA način citiranja

Petry, Nancy M., Leonardo F. Andrade, Danielle Barry, i Shannon Byrne. A Randomized Study of Reinforcing Ambulatory Exercise in Older Adults. 2013.