Daud, Nurul Fadila. “ANXIETY AS THE TRIGGER OF SELF DEFENSE MECHANISM IN THE NOVEL SLEEPING MURDER BY AGATHA CHRISTIE”. Prologue: Journal on Language and Literature 11, no. 1 (March 31, 2025): 116–128. Accessed June 30, 2025. https://prologue.sastra.uniba-bpn.ac.id/index.php/jurnal_prologue/article/view/135.