Gaya APA

Solorzano, H, S., Schmidt, J, P, L. (2004, 1998). NorthStar : Listening and Speaking (Intermediate) (Second Edition). White Plains: Pearson Education.

Gaya MLA

Solorzano, Helen, S.., Schmidt, Jennifer, P., L.. "NorthStar : Listening and Speaking (Intermediate)". Second Edition White Plains: Pearson Education, 2004, 1998. Text.