θiːədˈɔːɹɪk ɹᵻlˈaɪd hˈɛvili ˌɔn aɪslˈændɪk sˈoːɹsᵻz, pˈɑːsᵻbli ɪŋklˈuːdɪŋ ðɪ ˈoʊldɪst sˈɑːɡə ʌv sənt. ˈoʊlæf ænd ˈɑːdɚ snˈɔɹæsənz ɑːlˈɑːfs sˈɑːɡə tɹˈɪɡvɐsˌɑːnɑːɹ.
Theodoric relied heavily on Icelandic sources, possibly including the Oldest Saga of St. Olaf and Oddr Snorrason's Óláfs saga Tryggvasonar.