APA

Pettengill S. B., . (1940). Smoke-screen. New York: Southern Publishers, Inc.

Chicago

Pettengill Samuel Barrett, . 1940. Smoke-screen. New York: Southern Publishers, Inc.

Harvard

Pettengill S. B., . (1940). Smoke-screen. New York: Southern Publishers, Inc.

MLA

Pettengill Samuel Barrett, . Smoke-screen. New York: Southern Publishers, Inc. 1940.