APA (7th ed.) Citation

National Industrial Conference Board & Stieglitz, H. (1953). Escalators and the new BLS index. [publisher not identified].

Chicago Style (17th ed.) Citation

National Industrial Conference Board and Harold Stieglitz. Escalators and the New BLS Index. New York: [publisher not identified], 1953.

MLA (9th ed.) Citation

National Industrial Conference Board and Harold Stieglitz. Escalators and the New BLS Index. [publisher not identified], 1953.