Lua APA (7ú heag.)

Schmid, W. (1977). Hal leonard guitar method. Hal Leonard.

Lua i Stíl Chicago (17ú heag.)

Schmid, Will. Hal Leonard Guitar Method. Milwaukee: Hal Leonard, 1977.

Lua MLA (9ú heag.)

Schmid, Will. Hal Leonard Guitar Method. Hal Leonard, 1977.

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