APA (7th ed.) Citation

Lovecraft, H. P., & Derleth, A. (1964). At the mountains of madness: And other novels. Arkham House.

Chicago Style (17th ed.) Citation

Lovecraft, H. P., and August Derleth. At the Mountains of Madness: And Other Novels. Sauk City, Wis.: Arkham House, 1964.

MLA (9th ed.) Citation

Lovecraft, H. P., and August Derleth. At the Mountains of Madness: And Other Novels. Arkham House, 1964.