APA (7th ed.) Citation

Hutchinson, H. N., & Smit, J. (2013). Extinct Monsters A Popular Account of Some of the Larger Forms of Ancient Animal Life. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hutchinson, H. N., and J. Smit. Extinct Monsters A Popular Account of Some of the Larger Forms of Ancient Animal Life. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Hutchinson, H. N., and J. Smit. Extinct Monsters A Popular Account of Some of the Larger Forms of Ancient Animal Life. Project Gutenberg, 2013.

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