"Small silver salmon, one year old." Pencil drawing with pink wash, 18.5 x 32.4 cm.
MLA
Stenzel, Franz (1906-1998). "Small silver salmon, one year old." Pencil drawing with pink wash, 18.5 x 32.4 cm.. Box 6a, folder 119. n.d.. https://collections.library.yale.edu/catalog/2003188.
APA, 6th edition
Stenzel, Franz (1906-1998). (["Box 6a, folder 119"])(n.d.)["Small silver salmon, one year old." Pencil drawing with pink wash, 18.5 x 32.4 cm.]. https://collections.library.yale.edu/catalog/2003188.