APA

Stanley A., . (1977). Value engineering study of highway shoulder maintenance. ( Optimizing maintenance activities. Third report). Washington DC: U.S. Department of Transportation Federal Highway Administration. Report nr 77-210.

Chicago

Stanley AF, . 1977. Value engineering study of highway shoulder maintenance. ( Optimizing maintenance activities. Third report). Washington DC: U.S. Department of Transportation Federal Highway Administration. Report nr 77-210.

Harvard

Stanley A., . (1977). Value engineering study of highway shoulder maintenance. ( Optimizing maintenance activities. Third report). Washington DC: U.S. Department of Transportation Federal Highway Administration. Report nr 77-210.

MLA

Stanley AF, . Value engineering study of highway shoulder maintenance. ( Optimizing maintenance activities. Third report). Washington DC: U.S. Department of Transportation Federal Highway Administration. Report nr 77-210. 1977.