<em>How it works. </em><em>A camera obscura is a dark room with a small hole in one wall in its simplest form.</em><em> When it's bright outside, light enters through the hole and projects an upside-down image of the outside world onto the wall opposite the hole.</em>
first authors first and last name, then the title of the book followed by any chapters/sections used. then the volume (in applicable) them publishers and the year it was published. any editors are out at the end
