APA (7th ed.) Citation

Gillian, R. J. (1970). The chromatic number of a graph.

Chicago Style (17th ed.) Citation

Gillian, R. J. The Chromatic Number of a Graph. London, 1970.

MLA (8th ed.) Citation

Gillian, R. J. The Chromatic Number of a Graph. 1970.

Warning: These citations may not always be 100% accurate.