APA

Cottrell L. S., . (1969). The great invasion. New York: Pan Books.

Chicago

Cottrell Leonard S, . 1969. The great invasion. New York: Pan Books.

Harvard

Cottrell L. S., . (1969). The great invasion. New York: Pan Books.

MLA

Cottrell Leonard S, . The great invasion. New York: Pan Books. 1969.