Gaya APA

Balka, D, S. et al (2010). A guide to mathematics leadrship: squencing intsructional change . United States of America: Corwin Sage.

Gaya MLA

Balka, Don, S.. et al. "A guide to mathematics leadrship: squencing intsructional change". United States of America: Corwin Sage, 2010. Text.