Lua APA (7ú heag.)

Sheldon, S. (2001). The sky is falling. Compass Press, HarperCollins Publishers.

Lua i Stíl Chicago (17ú heag.)

Sheldon, Sidney. The Sky Is Falling. London ; Oxford ; Melbourne: Compass Press, HarperCollins Publishers, 2001.

Lua MLA (8ú heag.)

Sheldon, Sidney. The Sky Is Falling. Compass Press, HarperCollins Publishers, 2001.

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