APA引文

Burroughs, E. R. (2010). A princess of mars. Project Gutenberg.

Chicago Style (17th ed.) Citation

Burroughs, Edgar Rice. A Princess of Mars. To be supplied: Project Gutenberg, 2010.

MLA引文

Burroughs, Edgar Rice. A Princess of Mars. Project Gutenberg, 2010.

警告：這些引文格式不一定是100％准確.