Widmoser, J. (1992). Modern String Quartet: Four Brothers. MOOD-Records.
Čikaški stil citiranja (17. izdanje)Widmoser, Jörg. Modern String Quartet: Four Brothers. Heidelberg: MOOD-Records, 1992.
MLA način citiranja (8. izdanje)Widmoser, Jörg. Modern String Quartet: Four Brothers. MOOD-Records, 1992.
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