Dyfyniad APA

Cartmell , E., & Fowles , G. .. W. .. A. (1977). Valency and molecular structure (4ed.). Butterworth and Co publishers Ltd.

Dyfyniad Arddull Chicago

Cartmell , E., and G . W . A. Fowles. Valency and Molecular Structure. 4ed. London: Butterworth and Co publishers Ltd, 1977.

Dyfyniad MLA

Cartmell , E., and G . W . A. Fowles. Valency and Molecular Structure. 4ed. Butterworth and Co publishers Ltd, 1977.

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