O'Mara, P., & Lettner, C. (2004). A Rhythmic Concept for Funk - Fusion Drums: Peter O'Mara ; Christian Lettner. Advance Music.
Lua i Stíl Chicago (17ú heag.)O'Mara, Peter, agus Christian Lettner. A Rhythmic Concept for Funk - Fusion Drums: Peter O'Mara ; Christian Lettner. [S.l.]: Advance Music, 2004.
Lua MLA (8ú heag.)O'Mara, Peter, agus Christian Lettner. A Rhythmic Concept for Funk - Fusion Drums: Peter O'Mara ; Christian Lettner. Advance Music, 2004.
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