APA (7th ed.) Citation

Hardy, L. M., & Cole, C. J. (2010). Morphological Variation in a Population of the Snake, Tantilla gracilis Baird and Girard. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hardy, Laurence M., and Charles J. Cole. Morphological Variation in a Population of the Snake, Tantilla Gracilis Baird and Girard. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Hardy, Laurence M., and Charles J. Cole. Morphological Variation in a Population of the Snake, Tantilla Gracilis Baird and Girard. Project Gutenberg, 2010.

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