edited by John Robert Colombo
Hurtig Publishers, 1978
Buku Teks
Jenness, Diamond, author
National Museum of Canada, 1960
Buku Teks
Wells, Kenneth McNeill, author
Jarrold & Sons, 1959
Buku Teks
Myrdal, Gunnar, 1898-, author
Pantheon Books, 1963
Buku Teks
Engler, Richard E.
Harper & Row, 1964
Buku Teks