APA

United States, . (1967). Public safety agency employment data: Hearings, Ninetieth Congress, first session, on H.R. 4996. Hearing held in Washington, D. C., July 20, 1967. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1967. Public safety agency employment data: Hearings, Ninetieth Congress, first session, on H.R. 4996. Hearing held in Washington, D. C., July 20, 1967. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1967). Public safety agency employment data: Hearings, Ninetieth Congress, first session, on H.R. 4996. Hearing held in Washington, D. C., July 20, 1967. Washington: U.S. Govt. Print. Off.

MLA

United States, . Public safety agency employment data: Hearings, Ninetieth Congress, first session, on H.R. 4996. Hearing held in Washington, D. C., July 20, 1967. Washington: U.S. Govt. Print. Off. 1967.