APA (7th ed.) Citation

Hall, A. D. (2010). Porto Rico: Its History, Products and Possibilities. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hall, A. D. Porto Rico: Its History, Products and Possibilities. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Hall, A. D. Porto Rico: Its History, Products and Possibilities. Project Gutenberg, 2010.

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