APA (7th ed.) Citation

Saifuddin, I. A. (2010). Easy TOEFL Buku Pintar TOEFL. Buku Biru.

Chicago Style (17th ed.) Citation

Saifuddin, Irham Ali. Easy TOEFL Buku Pintar TOEFL. Buku Biru, 2010.

MLA (8th ed.) Citation

Saifuddin, Irham Ali. Easy TOEFL Buku Pintar TOEFL. Buku Biru, 2010.

Warning: These citations may not always be 100% accurate.