APA Citation

Gelling, P., & Gelling, P. (1990). Trumpet. Australia: Koala.

Chicago Style Citation

Gelling, Peter, and Peter Gelling. Trumpet. Australia: Koala, 1990.

MLA Citation

Gelling, Peter, and Peter Gelling. Trumpet. Australia: Koala, 1990.

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