APA

Johnson E. R., Huebner G. G. & Wilson G. L. (1940). Transportation: economic principles and practices. : Appleton-Century Company, Inc.

Chicago

Johnson Emory Richard, Huebner Grover Gerhardt and Wilson George Lloyd. 1940. Transportation: economic principles and practices. : Appleton-Century Company, Inc.

Harvard

Johnson E. R., Huebner G. G. and Wilson G. L. (1940). Transportation: economic principles and practices. : Appleton-Century Company, Inc.

MLA

Johnson Emory Richard, Huebner Grover Gerhardt and Wilson George Lloyd. Transportation: economic principles and practices. : Appleton-Century Company, Inc. 1940.