Long, P. L. (1979). Study of messages text formats: Bibliographic search queries. Library of Congress.
Dyfyniad Arddull ChicagoLong, Philip L. Study of Messages Text Formats: Bibliographic Search Queries. Washington: Library of Congress, 1979.
Dyfyniad MLALong, Philip L. Study of Messages Text Formats: Bibliographic Search Queries. Library of Congress, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.