Gaya APA

Spencer, J, F. (2007). Science month by month grades 3-8 : practical ideas and activities for teachers and homeschoolers . California: John Wiley and Sons.

Gaya MLA

Spencer, Julia, Farish. "Science month by month grades 3-8 : practical ideas and activities for teachers and homeschoolers". California: John Wiley and Sons, 2007. Text.