Gaya APA
Bjarne, T., R., J., T. (1995).
Graph coloring problems / Tommy R. Jensen, Bjarne Toft .
New York:
John Wiley n Sons.
Gaya MLA
Toft, Bjarne., Jensen, Tommy, R..
"Graph coloring problems / Tommy R. Jensen, Bjarne Toft".
New York:
John Wiley n Sons,
1995.
Textbook.