Orosa, M. Y. (2015). Portal: Gateway to adventure. Studio 5 Designs, Inc.
Čikaški stil citiranja (17. izdanje)Orosa, Marily Ysip. Portal: Gateway to Adventure. [Makati City]: Studio 5 Designs, Inc, 2015.
MLA način citiranja (9. izdanje)Orosa, Marily Ysip. Portal: Gateway to Adventure. Studio 5 Designs, Inc, 2015.
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