Terban, M., & Campbell, H. (1998). Scholastic dictionary of spelling. Scholastic Reference.
Lua i Stíl Chicago (17ú heag.)Terban, Martin, agus Harry Campbell. Scholastic Dictionary of Spelling. United States: Scholastic Reference, 1998.
Lua MLA (9ú heag.)Terban, Martin, agus Harry Campbell. Scholastic Dictionary of Spelling. Scholastic Reference, 1998.
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