APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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