Kreckel, P. G. (1947). The parish organ book. J. Fischer & Bro..
Lua i Stíl Chicago (17ú heag.)Kreckel, Philip G. The Parish Organ Book. New York, N.Y.: J. Fischer & Bro., 1947.
Lua MLA (8ú heag.)Kreckel, Philip G. The Parish Organ Book. J. Fischer & Bro., 1947.
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