MLA

Wilder, Thornton, 1897-1975. "Abel Romero Castillo and a journalist" with Wilder, Foto Jordan, Guayaquil, Ecuador. Box 150, folder 3580. 1941. https://collections.library.yale.edu/catalog/2109033.

APA, 6th edition

Wilder, Thornton, 1897-1975. (["Box 150, folder 3580"])(1941)["Abel Romero Castillo and a journalist" with Wilder, Foto Jordan, Guayaquil, Ecuador]. https://collections.library.yale.edu/catalog/2109033.