Hartmann, P., & Mentel, J. (2007). Interactions access: Reading (4th edition.). New york: McGraw-Hill.
Dyfyniad Arddull ChicagoHartmann, Pamela., và James Mentel. Interactions Access: Reading. 4th edition. New york: McGraw-Hill, 2007.
Dyfyniad MLAHartmann, Pamela., và James Mentel. Interactions Access: Reading. 4th edition. New york: McGraw-Hill, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.