Cita APA (7a ed.)
Etherton, A. (1971). Objective English tests intermediate level (4. Ed.). Longman.
Cita Chicago Style (17a ed.)
Etherton, A.R.B. Objective English Tests Intermediate Level. 4. Ed. London: Longman, 1971.
Cita MLA (9a ed.)
Etherton, A.R.B. Objective English Tests Intermediate Level. 4. Ed. Longman, 1971.
Precaución: Estas citas no son 100% exactas.