Gaya APA
Barclay, G, W.
(1970).
Techniques of population analysis
(
2)
.
Amerika Serikat:
John Wiley and Sons.
Gaya MLA
Barclay, George, W..
"Techniques of population analysis".
2
Amerika Serikat:
John Wiley and Sons,
1970.
Agribisnis.