APA (7th ed.) Citation

Penrose, M. The Motor Girls on Crystal Bay; or, The Secret of the Red Oar.

Chicago Style (17th ed.) Citation

Penrose, Margaret. The Motor Girls on Crystal Bay; or, The Secret of the Red Oar.

MLA (9th ed.) Citation

Penrose, Margaret. The Motor Girls on Crystal Bay; or, The Secret of the Red Oar.

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