Biedroń A. Review of Exploring L1-L2 relationships: The impact of individual differences by Richard Sparks. 10.14746/ssllt [Internet]. 2023 Mar. 31 [cited 2024 Apr. 26];13(1):219-24. Available from: https://pressto.amu.edu.pl/index.php/ssllt/article/view/36132