APA (7th ed.) Citation

Gaiman, N., Dickson, D. K., & Simpson, M. J. (2003). Don't panic : Douglas Adams & The hitchiker's guide to the galaxy / Neil Gaiman ; additional material by David K. Dickson & M.J. Simpson: Douglas Adams & The hitchiker's guide to the galaxy (Updated ed.). Titan.

Chicago Style (17th ed.) Citation

Gaiman, Neil, David K. Dickson, and M. J. Simpson. Don't Panic : Douglas Adams & The Hitchiker's Guide to the Galaxy / Neil Gaiman ; Additional Material by David K. Dickson & M.J. Simpson: Douglas Adams & The Hitchiker's Guide to the Galaxy. Updated ed. London: Titan, 2003.

MLA (9th ed.) Citation

Gaiman, Neil, et al. Don't Panic : Douglas Adams & The Hitchiker's Guide to the Galaxy / Neil Gaiman ; Additional Material by David K. Dickson & M.J. Simpson: Douglas Adams & The Hitchiker's Guide to the Galaxy. Updated ed. Titan, 2003.

Warning: These citations may not always be 100% accurate.