Cita APA (7th ed.)

Ashbrook, P. (2003). Science is simple: Over 250 activities for preschoolers. Gryphon House.

Cita Chicago (17th ed.)

Ashbrook, Peggy. Science Is Simple: Over 250 Activities for Preschoolers. Beltsville, Md: Gryphon House, 2003.

Cita MLA (9th ed.)

Ashbrook, Peggy. Science Is Simple: Over 250 Activities for Preschoolers. Gryphon House, 2003.