OSBOURNE, C, et al. 2015. Cambridge English: Advanced (CAE) 1: Exam Essentials Practice Tests. Andover: National Geographic Learning.
Citáce podľa APA (7th ed.)Osbourne, C., Nuttall, C., Bradbury, T., & Morris, C. (2015). Cambridge English: Advanced (CAE) 1: Exam Essentials Practice Tests. National Geographic Learning.
Citácia podle Chicago (17th ed.)Osbourne, Charles, Carol Nuttall, Tom Bradbury, a Claire Morris. Cambridge English: Advanced (CAE) 1: Exam Essentials Practice Tests. Andover: National Geographic Learning, 2015.
Citácia podľa MLA (8th ed.)Osbourne, Charles, et al. Cambridge English: Advanced (CAE) 1: Exam Essentials Practice Tests. National Geographic Learning, 2015.
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