Cita APA

Speakman, J. C. (1939). An introduction to the modern theory of valency. London: Edward Arnold.

Citación estilo Chicago

Speakman, J. C. An Introduction to the Modern Theory of Valency. London: Edward Arnold, 1939.

Cita MLA

Speakman, J. C. An Introduction to the Modern Theory of Valency. London: Edward Arnold, 1939.