(2015). 豐年．2015,v.65,no.17-20.
Chicago Style aipamena豐年．2015,v.65,no.17-20. 2015.
MLA aipamena豐年．2015,v.65,no.17-20. 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena
(2015). 豐年．2015,v.65,no.17-20.
Chicago Style aipamena豐年．2015,v.65,no.17-20. 2015.
MLA aipamena豐年．2015,v.65,no.17-20. 2015.