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Utomo, Yusuf Eko and , Ir.Alpha Febela P. MT (2018) Butterfly Park Di Boyolali. Diploma thesis, Universitas Muhammadiyah Surakarta.
Durrun Nafis, Moh and , Ir.Alpha Febela P. MT (2016) Resort Alam Bukit Sekipan Tawangmangu. Diploma thesis, Universitas Muhammadiyah Surakarta.