APA (7th ed.) Citation

Lee, C. L. (2004). On crossing numbers and removal numbers of graphs.

Chicago Style (17th ed.) Citation

Lee, Chan Lye. On Crossing Numbers and Removal Numbers of Graphs. 2004.

MLA (8th ed.) Citation

Lee, Chan Lye. On Crossing Numbers and Removal Numbers of Graphs. 2004.

Warning: These citations may not always be 100% accurate.