APA (7th ed.) Citation

Crane, W. (2005). An Alphabet of Old Friends. Project Gutenberg.

Chicago Style (17th ed.) Citation

Crane, Walter. An Alphabet of Old Friends. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Crane, Walter. An Alphabet of Old Friends. Project Gutenberg, 2005.

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