Pronunciation: [hˈadst ɹˈɛfɹəns] (IPA)
Correct spelling for the English word "hadst reference" is [hˈadst ɹˈɛfɹəns], [hˈadst ɹˈɛfɹəns], [h_ˈa_d_s_t ɹ_ˈɛ_f_ɹ_ə_n_s] (IPA phonetic alphabet).