Grolier Internartional. (1987). Grolier academic encyclopedia: Vol :12. Grolier Internartional , Academic Aremiracan.
Chicago-čujuhus (17. p.)Grolier Internartional. Grolier Academic Encyclopedia: Vol :12. USA: Grolier Internartional , Academic Aremiracan, 1987.
MLA-čujuhus (9. p.)Grolier Internartional. Grolier Academic Encyclopedia: Vol :12. Grolier Internartional , Academic Aremiracan, 1987.
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