ETS. (2016). OFFICIAL TOEFL iBT TESTS VOLUME 2 (WITH CD) (2ND ED.). MC GRAW HILL.
Cita Chicago Style (17a ed.)ETS. OFFICIAL TOEFL IBT TESTS VOLUME 2 (WITH CD). 2ND ED. NEW DELHI: MC GRAW HILL, 2016.
Cita MLA (9a ed.)ETS. OFFICIAL TOEFL IBT TESTS VOLUME 2 (WITH CD). 2ND ED. MC GRAW HILL, 2016.
Precaución: Estas citas no son 100% exactas.