Cita APA (7th ed.)

Gatenby, E. V. (1966). A Direct method english course: Teacher's book two. Longmans.

Cita Chicago (17th ed.)

Gatenby, E. V. A Direct Method English Course: Teacher's Book Two. London: Longmans, 1966.

Cita MLA (9th ed.)

Gatenby, E. V. A Direct Method English Course: Teacher's Book Two. Longmans, 1966.