APA Citation

Gelling, P., & Gelling, P. (1998). Blues keyboard method. Australia: Koala.

Chicago Style Citation

Gelling, Peter, and Peter Gelling. Blues Keyboard Method. Australia: Koala, 1998.

MLA Citation

Gelling, Peter, and Peter Gelling. Blues Keyboard Method. Australia: Koala, 1998.

Warning: These citations may not always be 100% accurate.