APA-referens

Joseph Wood Krutch. (1968). Grand Canyon: Today and its yesterday. New York: Apollo.

Chicago-stil citat

Joseph Wood Krutch. Grand Canyon: Today and Its Yesterday. New York: Apollo, 1968.

MLA-referens

Joseph Wood Krutch. Grand Canyon: Today and Its Yesterday. New York: Apollo, 1968.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.