@misc{10818/18478,
year = {2015},
month = {9},
url = {http://intellectum.unisabana.edu.co/handle/10818/18478},
abstract = {By the end of this lesson the student will be able to form sentences using for/since with present perfect. As well as he/she will able to understand sentences and frequently used expressions related to areas of most immediate relevance (e.g. very basic personal and family information, shopping, local geography, employment).  Grammar Review, Present Perfect Review, Tutorial Videos, Sentences Structures.},
publisher = {Universidad de La Sabana},
keywords = {Inglés comercial -- Enseñanza},
keywords = {Inglés -- Enseñanza},
keywords = {Inglés -- Vocabulario},
title = {Present Perfect Review},
author = {Parra Pérez, Diana Angélica and Galbreath, Amber and Corredor Plazas, Nelson Javier and Averanga, Alfredo Jose and Pinzón Heredia, Camila Andrea and Ruíz Mora, Karol Melissa and Menza Vados, Darío Alejandro},
}