Cita APA (7a ed.)

Richards, I. (1950). Pocket book course in basic english. Anglophone.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

Richards, I.A. Pocket Book Course in Basic English. Anglophone, 1950.