Cita APA (7th ed.)

Holton, D. A., & Sheehan, J. (1993). The Petersen graph. Cambridge University Press.

Cita Chicago (17th ed.)

Holton, Derek Allan, i J. Sheehan. The Petersen Graph. Cambridge: Cambridge University Press, 1993.

Cita MLA (9th ed.)

Holton, Derek Allan, i J. Sheehan. The Petersen Graph. Cambridge University Press, 1993.