Canal Stanford Online / YouTube. Donald Knuths Annual Christmas Tree Lecture, Planar Graphs and Ternary Trees.
芝加哥风格引文Canal Stanford Online / YouTube. Donald Knuths Annual Christmas Tree Lecture, Planar Graphs and Ternary Trees.
MLA引文Canal Stanford Online / YouTube. Donald Knuths Annual Christmas Tree Lecture, Planar Graphs and Ternary Trees.
警告：这些引文格式不一定是100％准确.