How to reference a website page properly

Sarah Loff, May 28, 2015, Green aviation project tests shape changing wing flaps. retrieved, May 28, 2015, from http://www.nasa.gov/image-feature/green-aviation-project-tests-shape-changing-wing-flaps

NZSL Poster

This is how you  spell my name in sign language.We had to spell our names in sign language.We had to take a photos of us doing our name in sign language and then put it on our blogs