APA (7th ed.) Citation

Chadwyck-Healey, Inc. (1998). The historical index to the New York times, 1851-1923. Chadwyck-Healey, Inc..

Chicago Style (17th ed.) Citation

Chadwyck-Healey, Inc. The Historical Index to the New York Times, 1851-1923. [Alexandria, Va.]: Chadwyck-Healey, Inc., 1998.

MLA (9th ed.) Citation

Chadwyck-Healey, Inc. The Historical Index to the New York Times, 1851-1923. Chadwyck-Healey, Inc., 1998.