APA (7th ed.) Citation

Goodwin, H. L. (2006). Rip Foster in Ride the Gray Planet. Project Gutenberg.

Chicago Style (17th ed.) Citation

Goodwin, Harold L. Rip Foster in Ride the Gray Planet. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Goodwin, Harold L. Rip Foster in Ride the Gray Planet. Project Gutenberg, 2006.

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