Dyfyniad APA

Pierce, D., & Douglas Pierce. (2007). Cracking the TOEFL IBT. [Tp.Hồ Chí Minh]: Trẻ.

Dyfyniad Arddull Chicago

Pierce, Douglas, và Douglas Pierce. Cracking the TOEFL IBT. [Tp.Hồ Chí Minh]: Trẻ, 2007.

Dyfyniad MLA

Pierce, Douglas, và Douglas Pierce. Cracking the TOEFL IBT. [Tp.Hồ Chí Minh]: Trẻ, 2007.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.