APA (7th ed.) Citation

Gordon, H. The River Motor Boat Boys on the Colorado; Or, The Clue in the Rocks.

Chicago Style (17th ed.) Citation

Gordon, Harry. The River Motor Boat Boys on the Colorado; Or, The Clue in the Rocks.

MLA (9th ed.) Citation

Gordon, Harry. The River Motor Boat Boys on the Colorado; Or, The Clue in the Rocks.

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