Boyden, S. (1992). Biohistory: The interplay between human society and the biosphere : past and present. Unesco and Parthenon Publishing Group.
Lua i Stíl Chicago (17ú heag.)Boyden, S. Biohistory: The Interplay Between Human Society and the Biosphere : Past and Present. Paris: Unesco and Parthenon Publishing Group, 1992.
Lua MLA (9ú heag.)Boyden, S. Biohistory: The Interplay Between Human Society and the Biosphere : Past and Present. Unesco and Parthenon Publishing Group, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.