Educational Testing Service. ETS research report series. Educational Testing Service.
Цитирование в стиле Чикаго (17-е изд.)Educational Testing Service. ETS Research Report Series. Princeton, N.J.: Educational Testing Service.
Цитирование MLA (9-е изд.)Educational Testing Service. ETS Research Report Series. Educational Testing Service.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.