Knauer, K. (2009). Time great discoveries: Explorations that changed history. Time Inc. Home Entertainment.
Citazione stile Chigago Style (17a edizione)Knauer, Kelly. Time Great Discoveries: Explorations That Changed History. New York, NY: Time Inc. Home Entertainment, 2009.
Citatione MLA (9a ed.)Knauer, Kelly. Time Great Discoveries: Explorations That Changed History. Time Inc. Home Entertainment, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.