Không rõ. (2003). Test preparation kit workbook TOEFL: Test of English as a foreign language 2002-2003. TR.
استشهاد بنمط شيكاغوKhông rõ. Test Preparation Kit Workbook TOEFL: Test of English As a Foreign Language 2002-2003. TR, 2003.
MLA استشهادKhông rõ. Test Preparation Kit Workbook TOEFL: Test of English As a Foreign Language 2002-2003. TR, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.