Solórzano, H. S. (2006). NorthStar: Building skills for the TOEFL iBT High Intermediate. White Plains, NY: Pearson Longman in cooperation with ETS.
शिकागो स्टाइल उद्धरणSolórzano, Helen S. NorthStar: Building Skills for the TOEFL IBT High Intermediate. White Plains, NY: Pearson Longman in cooperation with ETS, 2006.
एमएलए उद्धरणSolórzano, Helen S. NorthStar: Building Skills for the TOEFL IBT High Intermediate. White Plains, NY: Pearson Longman in cooperation with ETS, 2006.
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