Tài liệu tham khảo WikiPedia: Vẹt_thầy_tu_đuôi_dài http://bna.birds.cornell.edu/bna/species/322 http://www.birds.cornell.edu/clementschecklist/dow... //doi.org/10.2173%2Fbna.322 https://commons.wikimedia.org/wiki/Category:Myiops... https://species.wikimedia.org/wiki/Myiopsitta?usel...
