APA (7th ed.) Zitazioa
Mayer, L. V. Fundamentals of voice & diction (10th ed.). Brown & Benchmark.
Chicago Style (17th ed.) Zitazioa
Mayer, Lyle V. Fundamentals of Voice & Diction. 10th ed. Iowa: Brown & Benchmark.
MLA (9th ed.) Zitazioa
Mayer, Lyle V. Fundamentals of Voice & Diction. 10th ed. Brown & Benchmark.
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