Cita APA (7th ed.)

Howatt, A. P. R. (1969). Programmed Learning and the Language Teacher. Longmans.

Cita Chicago (17th ed.)

Howatt, Anthony P. R. Programmed Learning and the Language Teacher. Londres: Longmans, 1969.

Cita MLA (9th ed.)

Howatt, Anthony P. R. Programmed Learning and the Language Teacher. Longmans, 1969.