APA-viite

CURTIS D FRYE. (2013). Microsoft excel 2013 step by step. PHI Learning Pvt. Ltd.

Chicago-tyylinen lähdeviittaus

CURTIS D FRYE. Microsoft Excel 2013 Step by Step. New Delhi: PHI Learning Pvt. Ltd, 2013.

MLA-viite

CURTIS D FRYE. Microsoft Excel 2013 Step by Step. PHI Learning Pvt. Ltd, 2013.