Cita APA (7a ed.)

Alexander, L. G. (1976). Developing skills: An integrated course for intermediate students. Longman.

Cita Chicago Style (17a ed.)

Alexander, Louis George. Developing Skills: An Integrated Course for Intermediate Students. Londres: Longman, 1976.

Cita MLA (9a ed.)

Alexander, Louis George. Developing Skills: An Integrated Course for Intermediate Students. Longman, 1976.