Osbourne, C. (2015). Exam essentials practice tests cambridge english: first FCE: Completely updated for the 2015 exam specifications. United Kingdom: National Geographic learning;Cengage Learning.
शिकागो स्टाइल उद्धरणOsbourne, Charles. Exam Essentials Practice Tests Cambridge English: First FCE: Completely Updated for the 2015 Exam Specifications. United Kingdom: National Geographic learning;Cengage Learning, 2015.
एमएलए उद्धरणOsbourne, Charles. Exam Essentials Practice Tests Cambridge English: First FCE: Completely Updated for the 2015 Exam Specifications. United Kingdom: National Geographic learning;Cengage Learning, 2015.
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