Visual Steps (Firm). (2014). Digital photo editing with picasa for seniors: Get acqainted with picasa : free, easy-to-use photo editing software. Visual Steps.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVisual Steps (Firm). Digital Photo Editing with Picasa for Seniors: Get Acqainted with Picasa : Free, Easy-to-use Photo Editing Software. Netherlands: Visual Steps, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVisual Steps (Firm). Digital Photo Editing with Picasa for Seniors: Get Acqainted with Picasa : Free, Easy-to-use Photo Editing Software. Visual Steps, 2014.
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