APA (7th ed.) Citation

Lebert, M. (2011). The eBook is 40 (1971-2011). Project Gutenberg.

Chicago Style (17th ed.) Citation

Lebert, Marie. The EBook Is 40 (1971-2011). Project Gutenberg, 2011.

MLA (9th ed.) Citation

Lebert, Marie. The EBook Is 40 (1971-2011). Project Gutenberg, 2011.

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