Cita APA (7th ed.)

Alexander, L. G. (1967). Developing skills: An integrated course for intermediate students (1a. ed.). Longmans, Green and Co.

Cita Chicago (17th ed.)

Alexander, Louis George. Developing Skills: An Integrated Course for Intermediate Students. 1a. ed. Londres: Longmans, Green and Co, 1967.

Cita MLA (9th ed.)

Alexander, Louis George. Developing Skills: An Integrated Course for Intermediate Students. 1a. ed. Longmans, Green and Co, 1967.