APA (7th ed.) Citation

Worrall, J., & Worrall, I. J. (1969). Introduction to valence theory / by Jean Worrall and I. J. Worrall. Macdonald.

Chicago Style (17th ed.) Citation

Worrall, Jean, and I. J. Worrall. Introduction to Valence Theory / by Jean Worrall and I. J. Worrall. London: Macdonald, 1969.

MLA (9th ed.) Citation

Worrall, Jean, and I. J. Worrall. Introduction to Valence Theory / by Jean Worrall and I. J. Worrall. Macdonald, 1969.

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