Citazione Stile APA (7a Edizione)

National Geographic Society, Hiebert, F. T., Altoff, P., Fischer, F., Garrett, K., Kelly, J., . . . Slater, D. (2018). U.S. history: American stories ([Middle school, student edition - English].). National Geographic Learning/Cengage.

Citazione stile Chigago Style (17a edizione)

National Geographic Society, et al. U.S. History: American Stories. [Middle school, student edition - English]. Chicago, IL: National Geographic Learning/Cengage, 2018.

Citatione MLA (9a ed.)

National Geographic Society, et al. U.S. History: American Stories. [Middle school, student edition - English]. National Geographic Learning/Cengage, 2018.