Georgetown Law Library: Copyright Law Research Guide (неопр.). Georgetown University Law Library (май 2007). — «Nimmer on Copyright is a 10-volume treatise that is considered the leading secondary source on American copyright law. For decades Nimmer on Copyright was the only substantial copyright treatise. There were four-volume and two-volume works, but only in 2007 when William Patry issued a copyright treatise was there a treatise of comparable length and depth as Nimmer's work.» Дата обращения: 29 октября 2008. Архивировано 29 сентября 2008 года.
Attorney Search (неопр.). State Bar of California. Дата обращения: 29 октября 2008. Архивировано 16 мая 2011 года.
Georgetown Law Library: Copyright Law Research Guide (неопр.). Georgetown University Law Library (май 2007). — «Nimmer on Copyright is a 10-volume treatise that is considered the leading secondary source on American copyright law. For decades Nimmer on Copyright was the only substantial copyright treatise. There were four-volume and two-volume works, but only in 2007 when William Patry issued a copyright treatise was there a treatise of comparable length and depth as Nimmer's work.» Дата обращения: 29 октября 2008. Архивировано 29 сентября 2008 года.
