Osbourne, C., & Nuttall, C. (2015). Exam essentials practice tests 1 Cambridge English: Advanced (CAE). Hampshire: National Geographic Learning; Cengage Learning.
استشهاد بنمط شيكاغوOsbourne, Charles, و Carol Nuttall. Exam Essentials Practice Tests 1 Cambridge English: Advanced (CAE). Hampshire: National Geographic Learning; Cengage Learning, 2015.
MLA استشهادOsbourne, Charles, و Carol Nuttall. Exam Essentials Practice Tests 1 Cambridge English: Advanced (CAE). Hampshire: National Geographic Learning; Cengage Learning, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.