"De la ardua lección" (poem, on the death of Xavier Villaurrutia). Drafts, autograph manuscript and typescripts, with revisions
MLA
Procopio, Josefina. "De La Ardua Lección" (Poem, on the Death of Xavier Villaurrutia). Drafts, Autograph Manuscript and Typescripts, with Revisions. 0AD. https://collections.library.yale.edu/catalog/17282459.
APA, 6th edition
Procopio, J. (0 C.E.). "De la ardua lección" (poem, on the death of Xavier Villaurrutia). Drafts, autograph manuscript and typescripts, with revisions. https://collections.library.yale.edu/catalog/17282459.