APA-čujuhus (7. p.)
Penna, A. N. (2015). The human footprint: A global environmental history (Second edition.). Wiley Blackwell.
Chicago-čujuhus (17. p.)
Penna, Anthony N. The Human Footprint: A Global Environmental History. Second edition. Chichester, [England]: Wiley Blackwell, 2015.
MLA-čujuhus (9. p.)
Penna, Anthony N. The Human Footprint: A Global Environmental History. Second edition. Wiley Blackwell, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.