APA

U.S. Department of Transportation. Implementation package 79-9, . (1979). Signal operations analysis package. Vol. 1. Washington DC: U.S. Department of Transportation. Implementation package 79-9.

Chicago

U.S. Department of Transportation. Implementation package 79-9, . 1979. Signal operations analysis package. Vol. 1. Washington DC: U.S. Department of Transportation. Implementation package 79-9.

Harvard

U.S. Department of Transportation. Implementation package 79-9, . (1979). Signal operations analysis package. Vol. 1. Washington DC: U.S. Department of Transportation. Implementation package 79-9.

MLA

U.S. Department of Transportation. Implementation package 79-9, . Signal operations analysis package. Vol. 1. Washington DC: U.S. Department of Transportation. Implementation package 79-9. 1979.