APA (7th ed.) Citation

Wallace, E. (1973). The door with seven locks. White Lion Publishers.

Chicago Style (17th ed.) Citation

Wallace, Edgar. The Door with Seven Locks. London: White Lion Publishers, 1973.

MLA (8th ed.) Citation

Wallace, Edgar. The Door with Seven Locks. White Lion Publishers, 1973.

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