APA (7th ed.) Citation

Harper and Brothers. (2007). Publisher's Advertising (1872). Project Gutenberg.

Chicago Style (17th ed.) Citation

Harper and Brothers. Publisher's Advertising (1872). Project Gutenberg, 2007.

MLA (9th ed.) Citation

Harper and Brothers. Publisher's Advertising (1872). Project Gutenberg, 2007.

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