APA (7th ed.) Citation

Roosevelt, W. (2010). The Frontier Boys in the Grand Canyon; Or, A Search for Treasure. Project Gutenberg.

Chicago Style (17th ed.) Citation

Roosevelt, Wyn. The Frontier Boys in the Grand Canyon; Or, A Search for Treasure. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Roosevelt, Wyn. The Frontier Boys in the Grand Canyon; Or, A Search for Treasure. Project Gutenberg, 2010.

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