Sunderland, P., Whettem, E. Objective Proficiency. Cambridge: Cambridge Univ. Press, 2013 120 p.: ill. 978-1-107-61920-3.
Sunderland, P., Whettem, E. Objective Proficiency. Cambridge: Cambridge Univ. Press, 2013 120 p.: ill. 978-1-107-61920-3.
Sunderland, P., Whettem, E. (2013) Objective Proficiency, Cambridge: Cambridge Univ. Press 120 p.: ill. 978-1-107-61920-3.
Sunderland, P., & Whettem, E. (2013). Objective Proficiency. Workbook with answers. Cambridge: Cambridge Univ. Press, 120 p.: ill.
Sunderland P, Whettem E. Objective Proficiency: Workbook with answers. Cambridge: Cambridge Univ. Press; 2013. p. 120 p.: ill. ISBN: 978-1-107-61920-3.
