APA استشهاد

Cartmell, E., & fowles, G. W. A. (1977). Valency and molecular structure (Ed.4 /.).

استشهاد بنمط شيكاغو

Cartmell, E., و G W A. fowles. Valency and Molecular Structure. Ed.4 /. London : ELBS, 1977.

MLA استشهاد

Cartmell, E., و G W A. fowles. Valency and Molecular Structure. Ed.4 /. 1977.