International Phonetic Alphabet for Singers: A Manual for English and Foreign Language Diction
A Handbook of Diction for Singers: Italian, German, French
Diction Italian, Latin, French, German...the Sounds and 81 Exercises for Singing Them
Diction for Singers: A Concise Reference for English, Italian, Latin, German, French and Spanish Pronunciation
Webster's New World Italian Dictionary: Italian/English, English/Italian