APA (7th ed.) Citation

De Presno, O. (1993). The Online World. Project Gutenberg.

Chicago Style (17th ed.) Citation

De Presno, Odd. The Online World. Project Gutenberg, 1993.

MLA (9th ed.) Citation

De Presno, Odd. The Online World. Project Gutenberg, 1993.

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