Items where Author is "Ratna., Ratna."
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Ratna., Ratna. (2008) Perusahaan jasa angkutan truk pada PT. Tunas Kembang Sejahtera. Bachelor thesis, Universitas Pelita Harapan.
Ratna., Ratna. (2006) Tinjauan terhadap kendala-kendala kegiatan operasional bagian reservasi hotel di Asian Links Jakarta. Bachelor thesis, Universitas Pelita Harapan.