Hibbard, A., & Frenz, H. (1954). Writers of the Western World (2d ed., by Horst Frenz,..). Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Hibbard, Addison, agus Horst Frenz. Writers of the Western World. 2d ed., by Horst Frenz,.. Boston: Houghton Mifflin, 1954.
Lua MLA (8ú heag.)Hibbard, Addison, agus Horst Frenz. Writers of the Western World. 2d ed., by Horst Frenz,.. Houghton Mifflin, 1954.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.