Liu, M., Abe, K., Cao, M., Liu, S., Ok, D. U., Park, J.- bin, Parrish, C. M., & Sardegna, V. G. (2014). An analysis of social network websites for language learning: Implications for teaching and learning English as a Second Language. CALICO Journal, 32(1), 114-152. https://doi.org/10.1558/calico.v32i1.25963