Wilson, R. J., & Watkins, J. J. (1990). Graphs an introductory approach: A first course in discrete mathematics. John Wiley.
Citazione stile Chigago Style (17a edizione)Wilson, Robin J., e John J. Watkins. Graphs an Introductory Approach: A First Course in Discrete Mathematics. Nueva York: John Wiley, 1990.
Citatione MLA (9a ed.)Wilson, Robin J., e John J. Watkins. Graphs an Introductory Approach: A First Course in Discrete Mathematics. John Wiley, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.