Wotte, H. (1973). David Livingstone. Brockhaus.
Lua i Stíl Chicago (17ú heag.)Wotte, Herbert. David Livingstone. Leipzig: Brockhaus, 1973.
Lua MLA (8ú heag.)Wotte, Herbert. David Livingstone. Brockhaus, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.