APA (7th ed.) Citation

Copper, B. (1975). When footsteps echo: Tales of terror and the unknown. St. Martin's Press.

Chicago Style (17th ed.) Citation

Copper, Basil. When Footsteps Echo: Tales of Terror and the Unknown. New York: St. Martin's Press, 1975.

MLA (9th ed.) Citation

Copper, Basil. When Footsteps Echo: Tales of Terror and the Unknown. St. Martin's Press, 1975.