Cita APA (7th ed.)

Wendy Pfeffer. (2003). Wiggling Worms at Work (Let's-Read-and-Find-Out Science 2) (1.). HarperCollins.

Cita Chicago (17th ed.)

Wendy Pfeffer. Wiggling Worms at Work (Let's-Read-and-Find-Out Science 2). 1. HarperCollins, 2003.

Cita MLA (9th ed.)

Wendy Pfeffer. Wiggling Worms at Work (Let's-Read-and-Find-Out Science 2). 1. HarperCollins, 2003.