Gaya APA

Spencer, J, F. (2013). Science Month by Month Grades 3-8 Practical Ideas and Activities for Teachers and Homeschoolers . San Francisco, USA: Jossey Bass.

Gaya MLA

Spencer, Julia, Farish. "Science Month by Month Grades 3-8 Practical Ideas and Activities for Teachers and Homeschoolers". San Francisco, USA: Jossey Bass, 2013. Text.