APA (7th ed.) Citation

Katzel, L. I., Ivey, F. M., Sorkin, J. D., Macko, R. F., Smith, B., & Shulman, L. M. Impaired Economy of Gait and Decreased Six-Minute Walk Distance in Parkinson's Disease. Wiley.

Chicago Style (17th ed.) Citation

Katzel, Leslie I., Frederick M. Ivey, John D. Sorkin, Richard F. Macko, Barbara Smith, and Lisa M. Shulman. Impaired Economy of Gait and Decreased Six-Minute Walk Distance in Parkinson's Disease. Wiley.

MLA (9th ed.) Citation

Katzel, Leslie I., et al. Impaired Economy of Gait and Decreased Six-Minute Walk Distance in Parkinson's Disease. Wiley.