Singleton, E. d. 1. (1907). A guide to the opera: Description & interpretation of the words & music of the most celebrated operas. Dodd, Mead.
Čikaški stil citiranja (17. izdanje)Singleton, Esther d. 1930. A Guide to the Opera: Description & Interpretation of the Words & Music of the Most Celebrated Operas. New York: Dodd, Mead, 1907.
MLA način citiranja (9. izdanje)Singleton, Esther d. 1930. A Guide to the Opera: Description & Interpretation of the Words & Music of the Most Celebrated Operas. Dodd, Mead, 1907.
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