Lee, S. D., & Solopova, E. (2005). The keys of Middle-earth: Discovering medieval literature through the fiction of J.R.R. Tolkien. Palgrave Macmillan.
Lua i Stíl Chicago (17ú heag.)Lee, Stuart D., agus Elizabeth Solopova. The Keys of Middle-earth: Discovering Medieval Literature Through the Fiction of J.R.R. Tolkien. Basingstoke [England] ; New York: Palgrave Macmillan, 2005.
Lua MLA (8ú heag.)Lee, Stuart D., agus Elizabeth Solopova. The Keys of Middle-earth: Discovering Medieval Literature Through the Fiction of J.R.R. Tolkien. Palgrave Macmillan, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.