Dyfyniad APA
Heerema, E. (1984). Progressive class piano: A practical approach for beginners (2nd ed.). Califonia state Univ.
Dyfyniad Arddull Chicago
Heerema, Elmer. Progressive Class Piano: A Practical Approach for Beginners. 2nd ed. Northbridge: Califonia state Univ, 1984.
Dyfyniad MLA
Heerema, Elmer. Progressive Class Piano: A Practical Approach for Beginners. 2nd ed. Califonia state Univ, 1984.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.