APA (7th ed.) Citation

Baas, S., Oswald, F., & Wahl, H. (2005). Methodology. Enhancing mobility in later life.

Chicago Style (17th ed.) Citation

Baas, Stephan, Frank Oswald, and Hans-Werner Wahl. "Methodology." Enhancing Mobility in Later Life 2005.

MLA (9th ed.) Citation

Baas, Stephan, et al. "Methodology." Enhancing Mobility in Later Life, 2005.