Kastor, P. J. (2011). William Clark's world: Describing America in an age of unknowns. Yale University Press.
Chicago-referens (17:e uppl.)Kastor, Peter J. William Clark's World: Describing America in an Age of Unknowns. New Haven [Conn.]: Yale University Press, 2011.
MLA-referens (9:e uppl.)Kastor, Peter J. William Clark's World: Describing America in an Age of Unknowns. Yale University Press, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.