Gaya APA

Groth, R, E. (2013). Teaching mathematics in grades 6-12: developing research-based instructional practices . Thousand Oaks, California: SAGE Publications.

Gaya MLA

Groth, Randall, E.. "Teaching mathematics in grades 6-12: developing research-based instructional practices". Thousand Oaks, California: SAGE Publications, 2013. Text.