Cita APA (7a ed.)

Sweet, H. (1922). A primer of spoken english (4a. ed.). Clarendon.

Cita Chicago Style (17a ed.)

Sweet, Henry. A Primer of Spoken English. 4a. ed. Oxford: Clarendon, 1922.

Cita MLA (9a ed.)

Sweet, Henry. A Primer of Spoken English. 4a. ed. Clarendon, 1922.