Kohler, H. (1968). Scarcity Challenged An Introduction To Economics Heinz Kohler. Holt, Rinehart and Winston.
Chicago-viite (17. p.)Kohler, Heinz. Scarcity Challenged An Introduction To Economics Heinz Kohler. Holt, Rinehart and Winston, 1968.
MLA-viite (8. p.)Kohler, Heinz. Scarcity Challenged An Introduction To Economics Heinz Kohler. Holt, Rinehart and Winston, 1968.
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