APA (7th ed.) Citation

Pratchett, T., Perry, S. M., & Olson, P. (2004). Once more with footnotes: Terry Pratchett. NESFA Press.

Chicago Style (17th ed.) Citation

Pratchett, Terry, Sheila M. Perry, and Priscilla Olson. Once More with Footnotes: Terry Pratchett. Framingham, Mass.: NESFA Press, 2004.

MLA (9th ed.) Citation

Pratchett, Terry, et al. Once More with Footnotes: Terry Pratchett. NESFA Press, 2004.