(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.
Dyfyniad Arddull Chicago(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.
Dyfyniad MLA(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.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.