Lua APA (7ú heag.)

O'BRIEN, T. SIMPLY GRAMMAR- 7. V-CONNET.

Lua i Stíl Chicago (17ú heag.)

O'BRIEN, TERRY. SIMPLY GRAMMAR- 7. NEW DELHI: V-CONNET.

Lua MLA (9ú heag.)

O'BRIEN, TERRY. SIMPLY GRAMMAR- 7. V-CONNET.

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