College Entrance Examination Board. Advisory Panel on the Scholastic Aptitude Test Score Decline & Wirtz, W. (1977). On further examination: Report of the Advisory Panel on the Scholastic Aptitude Test Score Decline. College Entrance Examination Board.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)College Entrance Examination Board. Advisory Panel on the Scholastic Aptitude Test Score Decline و Willard Wirtz. On Further Examination: Report of the Advisory Panel on the Scholastic Aptitude Test Score Decline. New York: College Entrance Examination Board, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)College Entrance Examination Board. Advisory Panel on the Scholastic Aptitude Test Score Decline و Willard Wirtz. On Further Examination: Report of the Advisory Panel on the Scholastic Aptitude Test Score Decline. College Entrance Examination Board, 1977.