APA (7th ed.) Citation

Clinton, E. M., & Emshwiller, E. (2010). The Small World of M-75. Project Gutenberg.

Chicago Style (17th ed.) Citation

Clinton, Ed M., and Ed Emshwiller. The Small World of M-75. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Clinton, Ed M., and Ed Emshwiller. The Small World of M-75. Project Gutenberg, 2010.

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