APA

Riker D. A., United States, . (2012). International trade and local transportation employment. [Washington, D.C.]: International Trade Administration, Office of Competition and Economic Analysis.

Chicago

Riker David A, United States, . 2012. International trade and local transportation employment. [Washington, D.C.]: International Trade Administration, Office of Competition and Economic Analysis.

Harvard

Riker D. A., United States, . (2012). International trade and local transportation employment. [Washington, D.C.]: International Trade Administration, Office of Competition and Economic Analysis.

MLA

Riker David A, United States, . International trade and local transportation employment. [Washington, D.C.]: International Trade Administration, Office of Competition and Economic Analysis. 2012.