Cita APA (7th ed.)

De Schiffrin, R. (1973). English - My second language: Book 3. Longman Group.

Cita Chicago (17th ed.)

De Schiffrin, R.S. English - My Second Language: Book 3. London: Longman Group, 1973.

Cita MLA (9th ed.)

De Schiffrin, R.S. English - My Second Language: Book 3. Longman Group, 1973.