APA aipamena

Arias, P. R. (1997). Why upland farmers adopt conservation measures. Manila Bulletin.

Chicago Style aipamena

Arias, Priscila R. "Why Upland Farmers Adopt Conservation Measures." Manila Bulletin 1997.

MLA aipamena

Arias, Priscila R. "Why Upland Farmers Adopt Conservation Measures." Manila Bulletin, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.