A Course in Formal Languages, Automata and Groups
  MLA
  Chiswell, Ian M, et al. A Course In Formal Languages, Automata and Groups. Springer London, 2009.
  APA
  Chiswell, I. M, Axler, S., Capasso, V., Casacuberta, C., Macintyre, A. J, Ribet, K., Sabbah, C., & Suli, E. (2009). A Course in Formal Languages, Automata and Groups. Springer London.
  Chicago
  Chiswell, Ian M., Sheldon Axler, Vincenzo Capasso, Carles Casacuberta, Angus J Macintyre, Kenneth Ribet, Claude Sabbah, and Endre Suli. A Course In Formal Languages, Automata and Groups. : Springer London, 2009.