APA (7th ed.) Citation

Collins, H. P. (1967). John Cowper Powys, old earth-man. October House.

Chicago Style (17th ed.) Citation

Collins, H. P. John Cowper Powys, Old Earth-man. New York: October House, 1967.

MLA (8th ed.) Citation

Collins, H. P. John Cowper Powys, Old Earth-man. October House, 1967.