APA (7th ed.) Citation

Robinson, F. M., & Orban, P. (2010). The Worlds of Joe Shannon. Project Gutenberg.

Chicago Style (17th ed.) Citation

Robinson, Frank M., and Paul Orban. The Worlds of Joe Shannon. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Robinson, Frank M., and Paul Orban. The Worlds of Joe Shannon. Project Gutenberg, 2010.

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