APA

Cartmell E., Fowles G. W. A., . (1977). Valency and molecular structure. London: The English language book society.

Chicago

Cartmell E, Fowles G W A, . 1977. Valency and molecular structure. London: The English language book society.

Harvard

Cartmell E., Fowles G. W. A., . (1977). Valency and molecular structure. London: The English language book society.

MLA

Cartmell E, Fowles G W A, . Valency and molecular structure. London: The English language book society. 1977.