Johnson, P. (1997). New directions in technical services: Trends and sources. Chicago, IL: American Library Association.
Dyfyniad Arddull ChicagoJohnson, Peggy. New Directions in Technical Services: Trends and Sources. Chicago, IL: American Library Association, 1997.
Dyfyniad MLAJohnson, Peggy. New Directions in Technical Services: Trends and Sources. Chicago, IL: American Library Association, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.