APA (7e ed.) Bronvermelding

Hilley, M., & Olson, L. F. (1998). PDM: Piano for the developing musician (Comprehensive edition.). Wadsworth Publishing.

Chicago (17e ed.) Bronvermelding

Hilley, Martha, en Lynn Freeman Olson. PDM: Piano for the Developing Musician. Comprehensive edition. Belmont, California: Wadsworth Publishing, 1998.

MLA (9e ed.) Bronvermelding

Hilley, Martha, en Lynn Freeman Olson. PDM: Piano for the Developing Musician. Comprehensive edition. Wadsworth Publishing, 1998.