APA
U.S. Department of the Interior, . (1978). Drainage manual. U.S. Department of the Interior: .
Chicago
U.S. Department of the Interior, . 1978. Drainage manual. U.S. Department of the Interior: .
Harvard
U.S. Department of the Interior, . (1978). Drainage manual. U.S. Department of the Interior: .
MLA
U.S. Department of the Interior, . Drainage manual. U.S. Department of the Interior: . 1978.