Grijalva, M. N. and Dioses Peña, G. (2002) “Levels of assertiveness: heteroassertiveness and self-assertiveness in a group of cocaine paste (PBC) users in therapeutic communities in the city of Trujillo”, Revista de Psicología (Trujillo), 4, pp. 3–11. Available at: http://revistas.ucv.edu.pe/index.php/revpsi/article/view/280 (Accessed: 3 July 2024).