Doyle, A. C., & Collins, A. (2005). The lost world (abridged version): 3 (elementary level). Macmillan.
Lua i Stíl Chicago (17ú heag.)Doyle, Arthur Conan, agus Anne Collins. The Lost World (abridged Version): 3 (elementary Level). Oxford: Macmillan, 2005.
Lua MLA (9ú heag.)Doyle, Arthur Conan, agus Anne Collins. The Lost World (abridged Version): 3 (elementary Level). Macmillan, 2005.
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