Cita APA (7a ed.)

(1928). An english language course for begginers. W. Heffer and Sons.

Cita Chicago Style (17a ed.)

An English Language Course for Begginers. Cambridge: W. Heffer and Sons, 1928.

Cita MLA (9a ed.)

An English Language Course for Begginers. W. Heffer and Sons, 1928.