Fuller, E. I., & La Dura, G. (1925). The visible of the invisible empire: "the maelstrom". Maelstrom Pub. Co..
Lua i Stíl Chicago (17ú heag.)Fuller, Edgar I., agus Geo La Dura. The Visible of the Invisible Empire: "The Maelstrom". Denver, Col.: Maelstrom Pub. Co., 1925.
Lua MLA (8ú heag.)Fuller, Edgar I., agus Geo La Dura. The Visible of the Invisible Empire: "The Maelstrom". Maelstrom Pub. Co., 1925.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.