APA Style

Solorzano, H. (2006). Northstar, Building Skills for the TOEFL iBT, High Intermediate [CD AUDIO] . : Pearson Education, Inc, New York. 2006.

MLA Style

Solorzano, Helen. "Northstar, Building Skills for the TOEFL iBT, High Intermediate [CD AUDIO]". : Pearson Education, Inc, New York. 2006, 2006. CD-AUDIO.