Holton,C.A, & Sheehan,J. (1993). Peterson graph. Cambridge University press.
Chicago Edition CitationHolton,C.A, and Sheehan,J. Peterson Graph. Cambridge: Cambridge University press, 1993.
MLA Edition CitationHolton,C.A, and Sheehan,J. Peterson Graph. Cambridge University press, 1993.
Warning: These citations may not always be 100% accurate.