Cita APA (7th ed.)

Ledo, R. (1961). Language testing: The construction and use of foreign language tests. Longmans.

Cita Chicago (17th ed.)

Ledo, Robert. Language Testing: The Construction and Use of Foreign Language Tests. [London]: Longmans, 1961.

Cita MLA (9th ed.)

Ledo, Robert. Language Testing: The Construction and Use of Foreign Language Tests. Longmans, 1961.