Citazione Stile APA (7a Edizione)

(2018). United States history ([Middle school, grades 6-8].). HMH, Houghton Mifflin Harcourt Publishing Company.

Citazione stile Chigago Style (17a edizione)

United States History. [Middle school, grades 6-8]. Orlando, Florida: HMH, Houghton Mifflin Harcourt Publishing Company, 2018.

Citatione MLA (9a ed.)

United States History. [Middle school, grades 6-8]. HMH, Houghton Mifflin Harcourt Publishing Company, 2018.