Citazione APA

Zeter, J. (2008). Sharpening skills for the TOEFL iBT: Four practice tests. Book 1. TR.

Stile di citazione Chicago

Zeter, Jeff. Sharpening Skills for the TOEFL IBT: Four Practice Tests. Book 1. TR, 2008.

Citazione MLA

Zeter, Jeff. Sharpening Skills for the TOEFL IBT: Four Practice Tests. Book 1. TR, 2008.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.