Citazione APA

Watkins, J. T., & Wilson, R. J. (1990). Graph: An introductory approach: a first course in discrete mathematics.

Stile di citazione Chicago

Watkins, John T., e Robin J. Wilson. Graph: An Introductory Approach: A First Course in Discrete Mathematics. New York, John Wiley and Sons, 1990.

Citazione MLA

Watkins, John T., e Robin J. Wilson. Graph: An Introductory Approach: A First Course in Discrete Mathematics. 1990.