APA (7th ed.) Citation

Richmond, L., & Schoenherr, J. (2009). Prologue to an Analogue. Project Gutenberg.

Chicago Style (17th ed.) Citation

Richmond, Leigh, and John Schoenherr. Prologue to an Analogue. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Richmond, Leigh, and John Schoenherr. Prologue to an Analogue. Project Gutenberg, 2009.

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