DePressles, E. (1939). Guitar (Spanish): A fundamental course for individual or like-instrument class instruction / E.L. DePressles. Rubank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDePressles, E.L. Guitar (Spanish): A Fundamental Course for Individual or Like-instrument Class Instruction / E.L. DePressles. Miami, Fl.: Rubank, 1939.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDePressles, E.L. Guitar (Spanish): A Fundamental Course for Individual or Like-instrument Class Instruction / E.L. DePressles. Rubank, 1939.
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