Who are they? :
Prepared at the request of the Committee on Un-American Actvities.

APA Citation

Library of Congress. Legislative Reference Service. (1957). Who are they?: Prepared at the request of the Committee on Un-American Actvities. Washington: U.S. Govt. Print. Off.

MLA Citation

Library of Congress. Legislative Reference Service. Who Are They?: Prepared At the Request of the Committee On Un-American Actvities. Washington: U.S. Govt. Print. Off, 1957.