MLA

Kirkup, James, 1918-2009. Portrait of a Planet, English translation by James Kirkup, typescript and related mateiral. Box 107, folder 991-994. 1971-1973. https://collections.library.yale.edu/catalog/16620274.

APA, 6th edition

Kirkup, James, 1918-2009. (["Box 107, folder 991-994"])(1971-1973)[Portrait of a Planet, English translation by James Kirkup, typescript and related mateiral]. https://collections.library.yale.edu/catalog/16620274.