APA (7th ed.) Citation

Delgado, A. (1959). The Pony Club Book No. 10. The World's Work, etc.

Chicago Style (17th ed.) Citation

Delgado, Alan. The Pony Club Book No. 10. Kingswood: The World's Work, etc, 1959.

MLA (9th ed.) Citation

Delgado, Alan. The Pony Club Book No. 10. The World's Work, etc, 1959.