Download Inverted Pyramid Ppt Slides, slidegeeks.com [online], last updated Feb. 17, 2012, [retrieved Apr. 24, 2017], retrieved from the Internet <URL:https://www.slidegeeks.com/business/product/download-inverted-pyramid-ppt-slides>. |
Golden Pyramids, by Alivender, YouTube.com [online], published Mar. 22, 2013, [retrieved Apr. 24, 2017], retrieved from the Internet <URL:https://www.youtube.com/watch?v=1m1bhWxORR0>. |
Orange Reflection Pyramid Rendered Stock Illustration, by Novak, dreamstime.com [online], published by Sep. 28, 2015, [retrieved Apr. 24, 2017], retrieved from the Internet <URL: https://www.dreamstime.com/stock-illustration-orange-reflection-pyramid-rendered-white-background-image41679231>. |