APA (7th ed.) Citation

Regional Language Centre & Richards, D. (1983). Concepts and functions in current syllabuses. SEAMEO Regional Language Centre.

Chicago Style (17th ed.) Citation

Regional Language Centre and David Richards. Concepts and Functions in Current Syllabuses. Singapore: SEAMEO Regional Language Centre, 1983.

MLA (9th ed.) Citation

Regional Language Centre and David Richards. Concepts and Functions in Current Syllabuses. SEAMEO Regional Language Centre, 1983.