APA (7th ed.) Citation

Chapman, A., Buck, W. J., Caldwell, E., & Crawhall, J. (2012). Unexplored Spain. Project Gutenberg.

Chicago Style (17th ed.) Citation

Chapman, Abel, Walter J. Buck, E. Caldwell, and Joseph Crawhall. Unexplored Spain. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Chapman, Abel, et al. Unexplored Spain. Project Gutenberg, 2012.

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