楊德清 Der-Ching Yang. (2015). 臺灣、美國與新加坡國中階段幾何教材內容之分析比較 Geometry Content of Middle School Textbooks in Taiwan, the United States, and Singapore. National Taiwan Normal University.
Chicago Style (17th ed.) Citation楊德清 Der-Ching Yang. 臺灣、美國與新加坡國中階段幾何教材內容之分析比較 Geometry Content of Middle School Textbooks in Taiwan, the United States, and Singapore. National Taiwan Normal University, 2015.
MLA (9th ed.) Citation楊德清 Der-Ching Yang. 臺灣、美國與新加坡國中階段幾何教材內容之分析比較 Geometry Content of Middle School Textbooks in Taiwan, the United States, and Singapore. National Taiwan Normal University, 2015.
Warning: These citations may not always be 100% accurate.