APA (7th ed.) Citation

Thackeray, W. M. (2006). The Christmas Books of Mr. M.A. Titmarsh. Project Gutenberg.

Chicago Style (17th ed.) Citation

Thackeray, William Makepeace. The Christmas Books of Mr. M.A. Titmarsh. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Thackeray, William Makepeace. The Christmas Books of Mr. M.A. Titmarsh. Project Gutenberg, 2006.

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