The secret of a letter

MLA

Warden, Gertrude. The Secret of a Letter. New York [etc.]: The Federal Cook Company, 1894.

APA

Warden, G. (1894). The secret of a letter. New York [etc.]: The Federal Cook Company.

Chicago

Warden, Gertrude. The Secret of a Letter. New York [etc.]: The Federal Cook Company, 1894.