APA (7th ed.) Citation

Smith, E. E., & Dongen, H. R. v. (2007). Subspace Survivors. Project Gutenberg.

Chicago Style (17th ed.) Citation

Smith, E. E., and H. R. van Dongen. Subspace Survivors. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Smith, E. E., and H. R. van Dongen. Subspace Survivors. Project Gutenberg, 2007.

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