APA Style

Witherell, N, L., McMackin, M, C. (2007). Teaching vocabulary : Through differentiated instruction with levelled graphic organizers - Grades 4-8 . USA: Scholastic.

MLA Style

Witherell, Nancy, L.., McMackin, Mary, C.. "Teaching vocabulary : Through differentiated instruction with levelled graphic organizers - Grades 4-8". USA: Scholastic, 2007. Text.