Citazione Stile APA (7a Edizione)
O'Neill, T., & Block, I. Back Roads America: A Portfolio of Her People. National Geographic Society, Special Publications Division.
Citazione stile Chigago Style (17a edizione)
O'Neill, Tom, e Ira Block. Back Roads America: A Portfolio of Her People. Washington, EUA: National Geographic Society, Special Publications Division.
Citatione MLA (9a ed.)
O'Neill, Tom, e Ira Block. Back Roads America: A Portfolio of Her People. National Geographic Society, Special Publications Division.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.