Gaya APA

Jensen, T, R., Toft, B. (1995). Graph coloring problems / Tommy R. Jensen, Bjarne Toft . New York: John Wiley n Sons.

Gaya MLA

Jensen, Tommy, R.., Toft, Bjarne. "Graph coloring problems / Tommy R. Jensen, Bjarne Toft". New York: John Wiley n Sons, 1995. Textbook.