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Tathagati, Arini. (2018). Step by Step Membuat SOP (Standard Operating Procedure) . Yogyakarta: Efata Publishing.

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Tathagati, Arini. Step by Step Membuat SOP (Standard Operating Procedure). Yogyakarta: Efata Publishing, 2018. Text.

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Tathagati, Arini. Step by Step Membuat SOP (Standard Operating Procedure). Yogyakarta: Efata Publishing, 2018. Text.

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Tathagati, Arini. Step by Step Membuat SOP (Standard Operating Procedure). Yogyakarta: Efata Publishing, 2018. Print.