Regional Language Centre & Richards, D. (1983). Concepts and functions in current syllabuses. SEAMEO Regional Language Centre.
Citazione stile Chigago Style (17a edizione)Regional Language Centre e David Richards. Concepts and Functions in Current Syllabuses. Singapore: SEAMEO Regional Language Centre, 1983.
Citatione MLA (9a ed.)Regional Language Centre e David Richards. Concepts and Functions in Current Syllabuses. SEAMEO Regional Language Centre, 1983.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.