Crowther, J. (1981). Advanced crosswords: For learners of English as a foreign language. Tokyo: Oxford University Press.
Trích dẫn kiểu ChicagoCrowther, Jonathan. Advanced Crosswords: For Learners of English As a Foreign Language. Tokyo: Oxford University Press, 1981.
Deismireacht MLACrowther, Jonathan. Advanced Crosswords: For Learners of English As a Foreign Language. Tokyo: Oxford University Press, 1981.
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