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APA Citation
Lahmann, C., Steinkrauss, R., & Schmid, M. S. (2016). factors Affecting Grammatical and Lexical Complexity of Long‐Term L2 Speakers' Oral Proficiency. Language learning, 66(2), 354–385. http://access.bl.uk/ark:/81055/vdc_100031989228.0x00005d