APA (7th ed.) Citation

Cartmell, E., & Fowles, G. W. A. (1961). Valency and molecular structure (2nd ed.). Butterworths.

Chicago Style (17th ed.) Citation

Cartmell, E., and G. W. A. Fowles. Valency and Molecular Structure. 2nd ed. London: Butterworths, 1961.

MLA (8th ed.) Citation

Cartmell, E., and G. W. A. Fowles. Valency and Molecular Structure. 2nd ed. Butterworths, 1961.