Tohutoro APA (7th ed.)
Petr, J. Weather and Yield. Elsevier.
Tohutoru Kātū Chicago (17th ed.)
Petr, Jirí. Weather and Yield. Amsterdam, Holanda: Elsevier.
Tohutoro MLA (9th ed.)
Petr, Jirí. Weather and Yield. Elsevier.
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