APA

Perard V. S., . (1957). Perspective. New York: Pitman Pub. Corp.

Chicago

Perard Victor Semon, . 1957. Perspective. New York: Pitman Pub. Corp.

Harvard

Perard V. S., . (1957). Perspective. New York: Pitman Pub. Corp.

MLA

Perard Victor Semon, . Perspective. New York: Pitman Pub. Corp. 1957.