Cita APA (7a ed.)
Terry, M., & Wilson, J. (2012). Focus on Academic Skills for IELTS (4.vyd.). Pearson Education Limited.
Cita Chicago Style (17a ed.)
Terry, Morgan, y Judith Wilson. Focus on Academic Skills for IELTS. 4.vyd. Harlow: Pearson Education Limited, 2012.
Cita MLA (9a ed.)
Terry, Morgan, y Judith Wilson. Focus on Academic Skills for IELTS. 4.vyd. Pearson Education Limited, 2012.
Precaución: Estas citas no son 100% exactas.