APA

United States, . (1973). Deep water ports: Hearing, Ninety-third Congress, first session, on S. 180 and S. 836. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1973. Deep water ports: Hearing, Ninety-third Congress, first session, on S. 180 and S. 836. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1973). Deep water ports: Hearing, Ninety-third Congress, first session, on S. 180 and S. 836. Washington: U.S. Govt. Print. Off.

MLA

United States, . Deep water ports: Hearing, Ninety-third Congress, first session, on S. 180 and S. 836. Washington: U.S. Govt. Print. Off. 1973.