Mayer, L. V. Fundamentals of voice & diction (10th ed.). Brown & Benchmark.
Tohutoru Kātū Chicago (17th ed.)Mayer, Lyle V. Fundamentals of Voice & Diction. 10th ed. Iowa: Brown & Benchmark.
Tohutoro MLA (9th ed.)Mayer, Lyle V. Fundamentals of Voice & Diction. 10th ed. Brown & Benchmark.
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