Commerce Clearing House. (1979). State tax handbook, as of October 1, 1979. Commerce Clearing House, Inc..
Dyfyniad Arddull ChicagoCommerce Clearing House. State Tax Handbook, as of October 1, 1979. Chic., Ill.: Commerce Clearing House, Inc., 1979.
Dyfyniad MLACommerce Clearing House. State Tax Handbook, as of October 1, 1979. Commerce Clearing House, Inc., 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.