McGregor, A. G., & Hobson, J. A. (1935). The correct economy for the machine age: The economic policy which must be pursued if prosperity is to be achieved and maintained (2nd ed.). Pitman.

McGregor, Alexander Grant, and John A. Hobson. The Correct Economy for the Machine Age: The Economic Policy Which Must Be Pursued If Prosperity Is to Be Achieved and Maintained. 2nd ed. Pitman, 1935.