Cita APA (7a ed.)

Strohmeyer, S. (2003). Bubbles in trouble. Headline.

Cita Chicago Style (17a ed.)

Strohmeyer, Sarah. Bubbles in Trouble. London: Headline, 2003.

Cita MLA (9a ed.)

Strohmeyer, Sarah. Bubbles in Trouble. Headline, 2003.