MLA

Somerville, Mary. On the Connexion of the Physical Sciences. 3th ed. London,: J. Murray, 1838.

APA

Somerville, M. (1838). On the connexion of the physical sciences. 3th ed. London,: J. Murray.

Chicago

Somerville, Mary, On the Connexion of the Physical Sciences. 3th ed. London,: J. Murray, 1838.