Department of Agriculture. The Forests of western and central Ecuador: Ecuador supplies the world with balsa.
Chicago Style (17th ed.) CitationDepartment of Agriculture. The Forests of Western and Central Ecuador: Ecuador Supplies the World with Balsa.
MLA引文Department of Agriculture. The Forests of Western and Central Ecuador: Ecuador Supplies the World with Balsa.
警告：這些引文格式不一定是100％准確.