Downey, M. T., Giese, J. R., & Metcalf, F. D. (1997). United States history: In the course of human events. West Publ.
Citazione stile Chigago Style (17a edizione)Downey, Matthew T., James R. Giese, e Fay D. Metcalf. United States History: In the Course of Human Events. St. Paul, Minn. [u.a.]: West Publ, 1997.
Citatione MLA (9a ed.)Downey, Matthew T., et al. United States History: In the Course of Human Events. West Publ, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.