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Tathagati, Arini. (2014). Step by step membuat SOP Standard Operating Procedure (Cetakan 1). Yogyakarta: Efata Pubishing.

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Tathagati, Arini. Step by step membuat SOP Standard Operating Procedure. Cetakan 1 Yogyakarta: Efata Pubishing, 2014. Text.

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Tathagati, Arini. Step by step membuat SOP Standard Operating Procedure. Cetakan 1 Yogyakarta: Efata Pubishing, 2014. Text.

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Tathagati, Arini. Step by step membuat SOP Standard Operating Procedure. Cetakan 1 Yogyakarta: Efata Pubishing, 2014. Print.