APA

United States, . (1969). The Selective Service System: its operation, practices, and procedures: Hearings, Ninety-first Congress, first session, pursuant to S. Res. 39. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1969. The Selective Service System: its operation, practices, and procedures: Hearings, Ninety-first Congress, first session, pursuant to S. Res. 39. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1969). The Selective Service System: its operation, practices, and procedures: Hearings, Ninety-first Congress, first session, pursuant to S. Res. 39. Washington: U.S. Govt. Print. Off.

MLA

United States, . The Selective Service System: its operation, practices, and procedures: Hearings, Ninety-first Congress, first session, pursuant to S. Res. 39. Washington: U.S. Govt. Print. Off. 1969.