APA (7th ed.) Citation

Cosmo, t. m., Trelawney, G., & Carrington, D. (1925). Ten exclusive magical secrets: As presented by Cosmo the Mystic (the famous medium & mesmerist). [publisher not identified].

Chicago Style (17th ed.) Citation

Cosmo, the mystic, Gabriel Trelawney, and Delamere Carrington. Ten Exclusive Magical Secrets: As Presented by Cosmo the Mystic (the Famous Medium & Mesmerist). [England]: [publisher not identified], 1925.

MLA (9th ed.) Citation

Cosmo, the mystic, et al. Ten Exclusive Magical Secrets: As Presented by Cosmo the Mystic (the Famous Medium & Mesmerist). [publisher not identified], 1925.