Cita APA

Friend, J. N. (1915). The theory of valency (2. ed.). London: Longmans-Green.

Citación estilo Chicago

Friend, J. Newton. The Theory of Valency. 2. ed. London: Longmans-Green, 1915.

Cita MLA

Friend, J. Newton. The Theory of Valency. 2. ed. London: Longmans-Green, 1915.