APA Edition Citation

Wray, R. A., Young, A. R. M., & Young, R. W. (2009). Sandstone Landforms.

Chicago Edition Citation

Wray, Robert A., Ann R M. Young, and Robert W. Young. Sandstone Landforms. U K, Cambridge, 2009.

MLA Edition Citation

Wray, Robert A., et al. Sandstone Landforms. 2009.