Lubbers Quesada, M. (2015). The L2 acquisition of Spanish subjects: Multiple perspectives. De Gruyter Mouton.

Lubbers Quesada, Margaret. The L2 Acquisition of Spanish Subjects: Multiple Perspectives. Boston, Massachusetts ; Berlin, Germany: De Gruyter Mouton, 2015.

Lubbers Quesada, Margaret. The L2 Acquisition of Spanish Subjects: Multiple Perspectives. De Gruyter Mouton, 2015.