APA (7th ed.) Citation

Keller, W. (1974). Introduction to music for children: Methodology playing the instruments suggestions for teachers.

Chicago Style (17th ed.) Citation

Keller, Wilhelm. Introduction to Music for Children: Methodology Playing the Instruments Suggestions for Teachers. Mainz ; London, 1974.

MLA (9th ed.) Citation

Keller, Wilhelm. Introduction to Music for Children: Methodology Playing the Instruments Suggestions for Teachers. 1974.