Hi Terri,
They all can be propagated the same way. Just cut the stem to whatever height you want .. no less than 8 inches please .. and it will start producing new growth from the sides. You can then take the parts you cut off and cut them down to about 8 inches each, strip off the leaves and stick about 2 inches of the bottom part into a good draining potting mix. They will root and you'll have a bunch of new plants! For the very tops of the plant, only strip off the leaves on the bottom 2 - 3 inches depending on how long your cuts are.
In the picture below, all the yellow arrows are pointing to roots! It might take a month or two for new growth to start appearing.
