APA

O'Neill H., Koering U., . (1951). The picture story of Alaska. New York: McKay.

Chicago

O'Neill Hester, Koering Ursula, . 1951. The picture story of Alaska. New York: McKay.

Harvard

O'Neill H., Koering U., . (1951). The picture story of Alaska. New York: McKay.

MLA

O'Neill Hester, Koering Ursula, . The picture story of Alaska. New York: McKay. 1951.