APA Style

Romanek, T., Cowles, R. (2003). Achoo! : the most interesting book you'll ever read about germs . New York, USA: Scholastic Inc.

MLA Style

Romanek, Trudee., Cowles, Rose. "Achoo! : the most interesting book you'll ever read about germs". New York, USA: Scholastic Inc, 2003. Text.