Cita APA (7a ed.)

Gatenby, E. V. (1960). A direct method english course (2nd ed.). Longman.

Cita Chicago Style (17a ed.)

Gatenby, E. V. A Direct Method English Course. 2nd ed. London: Longman, 1960.

Cita MLA (9a ed.)

Gatenby, E. V. A Direct Method English Course. 2nd ed. Longman, 1960.