(美)Michael A. Putlack，(加)Stephen Poirier，(美)Tony Covello编著. (2017). 托福考试专项高分突破．口语．Speaking. 中国宇航出版社.
Chicago Style (17th ed.) Citation(美)Michael A. Putlack，(加)Stephen Poirier，(美)Tony Covello编著. 托福考试专项高分突破．口语．Speaking. 中国宇航出版社, 2017.
MLA citiranje(美)Michael A. Putlack，(加)Stephen Poirier，(美)Tony Covello编著. 托福考试专项高分突破．口语．Speaking. 中国宇航出版社, 2017.
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