APA

Unkefer D., . (1986). Gray eagles. New York: Beech Tree Books.

Chicago

Unkefer Duane, . 1986. Gray eagles. New York: Beech Tree Books.

Harvard

Unkefer D., . (1986). Gray eagles. New York: Beech Tree Books.

MLA

Unkefer Duane, . Gray eagles. New York: Beech Tree Books. 1986.