Wilhelm Braune, A Gothic Grammar, with selections for reading and a glossary
“ FONOLOGY. CHAP. I. THE ALFABET.§ 1. The monuments of the Gothic language ar handed down to us in a peculiar alfabet which, according to Greek ecclesiastic writers, was invented by Wulfila (s. § 221) . The Gothic alfabet, however, is not entirely a new creation, but Wulfila based it on the Greek alfabet which he accomodated to the Gothic sounds, increasing it by several signs from the Latin alfabet, and, in a few cases, availing himself of the familiar runic alfabet. Of the Greek alfabet he also retaind the order and numerical value. ”
