Visual Steps (Firm). (2014). Digital photo editing with picasa for seniors: Get acqainted with picasa : free, easy-to-use photo editing software. Visual Steps.
Цитирование в стиле Чикаго (17-е изд.)Visual Steps (Firm). Digital Photo Editing with Picasa for Seniors: Get Acqainted with Picasa : Free, Easy-to-use Photo Editing Software. Netherlands: Visual Steps, 2014.
Цитирование MLA (8-е изд.)Visual Steps (Firm). Digital Photo Editing with Picasa for Seniors: Get Acqainted with Picasa : Free, Easy-to-use Photo Editing Software. Visual Steps, 2014.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.