Richards, D., & Richards, D. (1983). Concepts and function in current syllabuses. SEAMEO Regional Language Control.
Cita Chicago (17th ed.)Richards, David, i David Richards. Concepts and Function in Current Syllabuses. Singapore: SEAMEO Regional Language Control, 1983.
Cita MLA (9th ed.)Richards, David, i David Richards. Concepts and Function in Current Syllabuses. SEAMEO Regional Language Control, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.