APA (7th ed.) Citation

Tuttle, W. C. (1929). The mystery of the red triangle. Collins.

Chicago Style (17th ed.) Citation

Tuttle, W. C. The Mystery of the Red Triangle. London: Collins, 1929.

MLA (8th ed.) Citation

Tuttle, W. C. The Mystery of the Red Triangle. Collins, 1929.

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