ɪɾ ˈɔːlsoʊ ɪŋklˈuːdz, wˌɛɹ ɐpɹˈoʊpɹɪət, ðə lˈɔːz nˈʌmbɚ, ɐ ɹˈɛfɹəns tʊ ɐ sˈɪstəm ʌv klˌæsɪfɪkˈeɪʃən ʌv fˈoʊk sˈɔŋz, jˈuːzɪŋ wˈʌn lˈɛɾɚɹ ʌvðɪ ˈælfəbˌɛt ænd ˌʌp tə tˈuː nuːmˈɛɹɪk dˈɪdʒɪts, dɪvˈɛləpt baɪ dʒˈɔːɹdʒ mˈælkəm lˈɔːz ɪnðə nˈaɪntiːnhˈʌndɹɪd fˈɪfti z.
It also includes, where appropriate, the Laws number, a reference to a system of classification of folk songs, using one letter of the alphabet and up to two numeric digits, developed by George Malcolm Laws in the 1950s.