APA (7th ed.) Citation

Roosevelt, W. The Frontier Boys in the Grand Canyon; Or, A Search for Treasure.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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