APA (7e ed.) Bronvermelding

Walker, B. S. (1973). The great divide: The American wilderness - Time-Life books - Alexandria, Virginia. Time-Life Books.

Chicago (17e ed.) Bronvermelding

Walker, Bryce S. The Great Divide: The American Wilderness - Time-Life Books - Alexandria, Virginia. Estados Unidos: Time-Life Books, 1973.

MLA (9e ed.) Bronvermelding

Walker, Bryce S. The Great Divide: The American Wilderness - Time-Life Books - Alexandria, Virginia. Time-Life Books, 1973.