@book{85122,
	author = {Penny, David Harry. and Penny, David Harry.},
	title = {The index of economic-mindedness.},
	publisher = {Panitia Seksi Dokumentasi, Survey Agro Ekonomi,},
	year = {1967.},
	address = {Bogor,},
	note = {"Kutipan dari The transition from subsistence to commercial family farming in North Sumatra."}
}