Gaya APA

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

Gaya MLA

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