COTTLER, J. (1966). Alfred Wallace: Explorer - naturalist. Little, Brown.
Lua i Stíl Chicago (17ú heag.)COTTLER, Joseph. Alfred Wallace: Explorer - Naturalist. Little, Brown, 1966.
Lua MLA (9ú heag.)COTTLER, Joseph. Alfred Wallace: Explorer - Naturalist. Little, Brown, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.