APA (7th ed.) Citation

Horner, J. A. Letter from Mr. Horner. [publisher not identified].

Chicago Style (17th ed.) Citation

Horner, Joseph Andrew. Letter from Mr. Horner. [Place of publication not identified]: [publisher not identified].

MLA (9th ed.) Citation

Horner, Joseph Andrew. Letter from Mr. Horner. [publisher not identified].

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