APA-viite (7. p.)
(1949). Experience with Human Factors in Agricultural Areas of the World. Extension Service, U.S. Department of Agriculture,.
Chicago-viite (17. p.)
Experience with Human Factors in Agricultural Areas of the World. Washington, D.C.: Extension Service, U.S. Department of Agriculture,, 1949.
MLA-viite (9. p.)
Experience with Human Factors in Agricultural Areas of the World. Extension Service, U.S. Department of Agriculture,, 1949.
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