we have used this photo for years as a drawing exercise , yes it is meant to be upside down if you do print it off keep it upside down, the point is to hinder you thinking about what it is and focusing on what the shapes and proportions are. The theory being that when you think, it is several ladies you stop looking at the shapes lines proportions and think of the subject. Do it same size start at one corner one shape at a time assessing the line and shape, its size angle etc. then the next shape then the next. It can be done with varying degrees of accuracy and concentration so if you want to be very strict, then go for it concentrate as fully as you can, but you will find you can be a little less rigid and still get good results, enjoy each shape see it as a full and goodly shape and give each shape it's due. You can turn it round at the end. And as with all exercise repetition is good, you can use a different picture of course one with good strong shapes