Gaya APA

Solórzano, H. (2006). Building Skills for the TOEFL iBT: Teacher's Manual with ETS Scoring Guide . New York: Pearson Education Inc..

Gaya MLA

Solórzano, Helen. "Building Skills for the TOEFL iBT: Teacher's Manual with ETS Scoring Guide". New York: Pearson Education Inc., 2006. Text.