APA (7th ed.) Citation

Garnett, D., & Garnett, R. A. (1929). Author's advertisement. [publisher not identified].

Chicago Style (17th ed.) Citation

Garnett, David, and R. A. Garnett. Author's Advertisement. [Place of publication not identified]: [publisher not identified], 1929.

MLA (9th ed.) Citation

Garnett, David, and R. A. Garnett. Author's Advertisement. [publisher not identified], 1929.