APA (7th ed.) Citation
Thomas, J. M. (1969). The Four Color Theorem. Selbstverl.
Chicago Style (17th ed.) Citation
Thomas, Joseph Miller. The Four Color Theorem. Philadelphia, Penn: Selbstverl, 1969.
MLA (9th ed.) Citation
Thomas, Joseph Miller. The Four Color Theorem. Selbstverl, 1969.
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