Cita APA

Gallagher, N., Nguyễn Văn Phước,, & Vũ Tài Hoa. (2004). Delta's key to the toefl test. Tp. HCM: Trẻ.

Chicago Style Citation

Gallagher, Namcy, Nguyễn Văn Phước, i Vũ Tài Hoa. Delta's Key to the Toefl Test. Tp. HCM: Trẻ, 2004.

Cita MLA

Gallagher, Namcy, Nguyễn Văn Phước, i Vũ Tài Hoa. Delta's Key to the Toefl Test. Tp. HCM: Trẻ, 2004.