"Soroki": holograph, signed "Chika Buka"
MLA
Rosimov, G. "Soroki": Holograph, Signed "Chika Buka". 0AD. https://collections.library.yale.edu/catalog/16537912.
APA, 6th edition
Rosimov, G. (0 C.E.). "Soroki": holograph, signed "Chika Buka". https://collections.library.yale.edu/catalog/16537912.