APA (7th ed.) Citation

Van Ulm, S. (1963). Four tragic days! [Houston Press].

Chicago Style (17th ed.) Citation

Van Ulm, Sidney. Four Tragic Days! Houston, Texas: [Houston Press], 1963.

MLA (9th ed.) Citation

Van Ulm, Sidney. Four Tragic Days! [Houston Press], 1963.

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