Restan, P. (1972). Syntax of the interrogative sentence: Yes-no questions (mainly on the basis of Russian material). Universitetsforlaget.
Citace podle Chicago (17th ed.)Restan, Per. Syntax of the Interrogative Sentence: Yes-no Questions (mainly on the Basis of Russian Material). Oslo: Universitetsforlaget, 1972.
Citace podle MLA (8th ed.)Restan, Per. Syntax of the Interrogative Sentence: Yes-no Questions (mainly on the Basis of Russian Material). Universitetsforlaget, 1972.
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