Economics is the study how individuals and society choose to use the scarse resources that nature and previous generation have provided. Pengertian tersebut dik

Economics is the study how individuals and society choose to use the scarse resources that nature and previous generation have provided. Pengertian tersebut dikemukakan oleh ....
a. Richard G. Lipsey
b. N. Gregory Mankiw
c. Robert B. Ekelund Jr. dan Robert D. Tollison
d. Paul Samuelson
e. Karl E. Case dan Ray C. Fair