Lua APA (7ú heag.)

Sheftel, P. (1970). Exploring keyboard fundamentals. Holt, Rinehart.

Lua i Stíl Chicago (17ú heag.)

Sheftel, Paul. Exploring Keyboard Fundamentals. New York: Holt, Rinehart, 1970.

Lua MLA (9ú heag.)

Sheftel, Paul. Exploring Keyboard Fundamentals. Holt, Rinehart, 1970.

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