Widger, D. (2012). The Project Gutenberg Collection of Works by Freethinkers With Linked On-line and Off-line Indexes to 157 Volumes by 90 Authors; Plus Indexes to 15 other Author's Multi-Volume Sets. Project Gutenberg.
Chicago Style (17th ed.) CitationWidger, David. The Project Gutenberg Collection of Works by Freethinkers With Linked On-line and Off-line Indexes to 157 Volumes by 90 Authors; Plus Indexes to 15 Other Author's Multi-Volume Sets. Project Gutenberg, 2012.
MLA (9th ed.) CitationWidger, David. The Project Gutenberg Collection of Works by Freethinkers With Linked On-line and Off-line Indexes to 157 Volumes by 90 Authors; Plus Indexes to 15 Other Author's Multi-Volume Sets. Project Gutenberg, 2012.
Warning: These citations may not always be 100% accurate.