APA (7th ed.) Citation

Said, M. Y. @. M. Y., Butler, M., & Snook, C. (2015). A method of refinement in UML-B. Springer-Verlag Berlin Heidelberg.

Chicago Style (17th ed.) Citation

Said, Mar Yah @ Mek Yah, Micheal Butler, and Colin Snook. A Method of Refinement in UML-B. Springer-Verlag Berlin Heidelberg, 2015.

MLA (9th ed.) Citation

Said, Mar Yah @ Mek Yah, et al. A Method of Refinement in UML-B. Springer-Verlag Berlin Heidelberg, 2015.