Edgeworth, R. L. (1793). An essay on the art of conveying secret and swift intelligence. With 3 plates.
Lua i Stíl Chicago (17ú heag.)Edgeworth, Richard Lovell. An Essay on the Art of Conveying Secret and Swift Intelligence. With 3 Plates. 1793.
Lua MLA (9ú heag.)Edgeworth, Richard Lovell. An Essay on the Art of Conveying Secret and Swift Intelligence. With 3 Plates. 1793.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
