APA

Hausman L. A., . (1944). The illustrated encyclopedia of American birds. New York: Halcyon house.

Chicago

Hausman Leon Augustus, . 1944. The illustrated encyclopedia of American birds. New York: Halcyon house.

Harvard

Hausman L. A., . (1944). The illustrated encyclopedia of American birds. New York: Halcyon house.

MLA

Hausman Leon Augustus, . The illustrated encyclopedia of American birds. New York: Halcyon house. 1944.