APA (7th ed.) Citation

McGuire, J. J., & Piper, H. B. (2006). Lone Star Planet. Project Gutenberg.

Chicago Style (17th ed.) Citation

McGuire, John Joseph, and H. Beam Piper. Lone Star Planet. Project Gutenberg, 2006.

MLA (9th ed.) Citation

McGuire, John Joseph, and H. Beam Piper. Lone Star Planet. Project Gutenberg, 2006.

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