Rujukan WorldCat

  1. ↑ "Search for library items". WorldCat. Online Computer Library Center. Dicapai 2017-03-29. 
  2. ↑ 1998 is the date of registry of the WorldCat.org domain; see: "WorldCat.org WHOIS, DNS, & Domain Info – DomainTools". WHOIS. Dicapai 2017-01-21.  However, the union catalog that became WorldCat was started three decades earlier, and it was already available on the web to subscriber libraries at OCLC.org several years before WorldCat.org was a registered domain name; see: "OCLC.org WHOIS, DNS, & Domain Info – DomainTools". WHOIS. Dicapai 2019-06-26. 
  3. ↑ "Worldcat.org Traffic, Demographics and Competitors – Alexa". www.alexa.com. Dicapai 4 February 2019. 
  4. 1 2 "WorldCat facts and statistics". Online Computer Library Center. 2011. Dicapai 6 November 2011. 
  5. ↑ Margalit Fox (August 2, 2006). "Frederick G. Kilgour, Innovative Librarian, Dies at 92". The New York Times. Dicapai 22 Disember 2009. Frederick G. Kilgour, seorang pustakawan yang terkemuka yang menjadikan konsortium perpustakaan-perpustakaan Ohio sebuah koperasi perpustakaan terbesar di dunia pada hampir 50 tahun dahulu lantas membuatkan katalog ribuan perpustakaan di seluruh dunia boleh dicapai dengan segera oleh pelanggan yang menetap di tempat terpencil, telah kematian pada hari Isnin di Bukit Chapel, Karolina Utara. Dia berumur 92.