Cita APA

Richards, I. (1950). Pocket book course in basic english. [S.l.]: Anglophone.

Citación estilo Chicago

Richards, I.A. Pocket Book Course in Basic English. [S.l.]: Anglophone, 1950.

Cita MLA

Richards, I.A. Pocket Book Course in Basic English. [S.l.]: Anglophone, 1950.