APA Zitierstil

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

Chicago Zitierstil

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

MLA Zitierstil

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

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.