APA (7th ed.) Citation
ebrary, Inc, Usó Juan, E., & Martínez Flor, A. (2006). Current trends in the development and teaching of the four language skills. M. de Gruyter.
Chicago Style (17th ed.) Citation
ebrary, Inc, Esther Usó Juan, and Alicia Martínez Flor. Current Trends in the Development and Teaching of the Four Language Skills. Berlin ; New York: M. de Gruyter, 2006.
MLA (9th ed.) Citation
ebrary, Inc, et al. Current Trends in the Development and Teaching of the Four Language Skills. M. de Gruyter, 2006.
Warning: These citations may not always be 100% accurate.