Tan, B. G. (1986). The effectiveness of using instructional objectives as a preinstructional strategy with less able secondary school pupils.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tan, Boon Guat. The Effectiveness of Using Instructional Objectives as a Preinstructional Strategy with Less Able Secondary School Pupils. 1986.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Tan, Boon Guat. The Effectiveness of Using Instructional Objectives as a Preinstructional Strategy with Less Able Secondary School Pupils. 1986.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.