Gaya APA

Gallagher, N. (2005). Delta's Key to the Next Generation TOEFL Test: advanced skill practice For The IBT (Pertama). McHenry, IL.: Delta Publishing, Co..

Gaya MLA

Gallagher, Nancy. "Delta's Key to the Next Generation TOEFL Test: advanced skill practice For The IBT". Pertama McHenry, IL.: Delta Publishing, Co., 2005. Text.