• Dictionary of Botany                 http://botanydictionary.org/entries/2A.html

• Glossary of Plant Biology and Biochemistry

http://www.shieldsgardens.com/info/Glossary.html#C

• Plant Dictionary Glossary Terms Lexicon Online

http://www.ats-group.net/dictionaries/dictionary-glossary-plant.html

• Bách khoa toàn thư                               

http://www.wikipedia.org/wiki/                       

http://www.encyclopedia.com/                    

http://www.britannica.com                                                                                                   

• Tài liệu thống kê     http://www.gso.gov.vn

       http://data.worldbank.org/