Cita APA (7th ed.)
Biggs, N., Lloyd, E. K., & Wilson, R. J. Graph Theory 1736-1936. Clarendon : Oxford University.
Cita Chicago (17th ed.)
Biggs, Norman, E. Keith Lloyd, i Robin J. Wilson. Graph Theory 1736-1936. Oxford, Inglaterra: Clarendon : Oxford University.
Cita MLA (9th ed.)
Biggs, Norman, et al. Graph Theory 1736-1936. Clarendon : Oxford University.
Atenció: Aquestes cites poden no estar 100% correctes.