APA

United States, . (2009). Proposal of emission control area designation for geographic control of emissions from ships. Washington, D.C: U.S. Environmental Protection Agency, Office of Trransportation and Air Quality.

Chicago

United States, . 2009. Proposal of emission control area designation for geographic control of emissions from ships. Washington, D.C: U.S. Environmental Protection Agency, Office of Trransportation and Air Quality.

Harvard

United States, . (2009). Proposal of emission control area designation for geographic control of emissions from ships. Washington, D.C: U.S. Environmental Protection Agency, Office of Trransportation and Air Quality.

MLA

United States, . Proposal of emission control area designation for geographic control of emissions from ships. Washington, D.C: U.S. Environmental Protection Agency, Office of Trransportation and Air Quality. 2009.