Earp, E. L. (1911). The social engineer. Eaton & Mains; Jennings & Graham.
Lua i Stíl Chicago (17ú heag.)Earp, Edwin Lee. The Social Engineer. New York, Cincinnati: Eaton & Mains; Jennings & Graham, 1911.
Lua MLA (8ú heag.)Earp, Edwin Lee. The Social Engineer. Eaton & Mains; Jennings & Graham, 1911.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.