APA (7th ed.) Citation

Derleth, A. (1958). The mask of Cthulhu. Arkham House.

Chicago Style (17th ed.) Citation

Derleth, August. The Mask of Cthulhu. Sauk City, Wis.: Arkham House, 1958.

MLA (9th ed.) Citation

Derleth, August. The Mask of Cthulhu. Arkham House, 1958.

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