This information is on early disbuds but storage and propagation is the same.
http://www.thegardenersalmanac.co.uk/Data/Chrys%20disbuds/Chrys%20disbuds.htmNote the three pictures that are missing are on the compost mix.The slide show on propagation is currently under repairas well sorry about that :(
I am currently rebuilding my website and problems like these are the reason why.
I hope to have the revised site up and running for christmas, however this is the bit you want for now;
Lifting/Storing:
After flowering, plants should be cut down to 100-150mm (4"-6") above soil level, lifted, and placed in boxes or trays of potting compost and stored in a frost free place until required.
It is advantageous to remove all basal growth from around the base of the plant to induce a dormant period and reduce the risk of botrytis.Edit;
Just nipped out an took a picture of my spray chrysants which are kept in the same manner as early/late disbuds.
I use the paper to split the varieties because when they start 'sprouting' it is easy to get the varieties a bit mixed up which is rather annoying.