APA

United States, . (1968). Federal firearms legislation: Hearings, Ninetieth Congress, second session, pursuant to S. Res. 240, Ninetieth Congress. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1968. Federal firearms legislation: Hearings, Ninetieth Congress, second session, pursuant to S. Res. 240, Ninetieth Congress. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1968). Federal firearms legislation: Hearings, Ninetieth Congress, second session, pursuant to S. Res. 240, Ninetieth Congress. Washington: U.S. Govt. Print. Off.

MLA

United States, . Federal firearms legislation: Hearings, Ninetieth Congress, second session, pursuant to S. Res. 240, Ninetieth Congress. Washington: U.S. Govt. Print. Off. 1968.