APA

United States, . (1973). S. 1983, act to provide for conservation of endangered and threatened species of fish, wildlife, and plants. [Washington, D.C.]: .

Chicago

United States, . 1973. S. 1983, act to provide for conservation of endangered and threatened species of fish, wildlife, and plants. [Washington, D.C.]: .

Harvard

United States, . (1973). S. 1983, act to provide for conservation of endangered and threatened species of fish, wildlife, and plants. [Washington, D.C.]: .

MLA

United States, . S. 1983, act to provide for conservation of endangered and threatened species of fish, wildlife, and plants. [Washington, D.C.]: . 1973.