DiSilvestro, R. L., Palmer, C. N., & Chichester, P. (1991). The African elephant: Twilight in Eden. Wiley.
Lua i Stíl Chicago (17ú heag.)DiSilvestro, Roger L., Christopher N. Palmer, agus Page Chichester. The African Elephant: Twilight in Eden. New York: Wiley, 1991.
Lua MLA (8ú heag.)DiSilvestro, Roger L., et al. The African Elephant: Twilight in Eden. Wiley, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.