Doyle, M., & Lothamer, E. (1963). Punctuation: A programmed review. California Test Bureau.
Lua i Stíl Chicago (17ú heag.)Doyle, Marvyl, agus Eileen Lothamer. Punctuation: A Programmed Review. Monterey, Calif.: California Test Bureau, 1963.
Lua MLA (8ú heag.)Doyle, Marvyl, agus Eileen Lothamer. Punctuation: A Programmed Review. California Test Bureau, 1963.
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