Urdang, L. (1983). Idioms and phrases index. Gale Research.
Lua i Stíl Chicago (17ú heag.)Urdang, Laurence. Idioms and Phrases Index. Detroit, MI: Gale Research, 1983.
Lua MLA (9ú heag.)Urdang, Laurence. Idioms and Phrases Index. Gale Research, 1983.
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