"Notatniki I, II," notebooks
MLA
Wat, Aleksander, 1900-1967. "Notatniki I, II," notebooks. Box 30, folder 712-715. 1953 or 1954. https://collections.library.yale.edu/catalog/10512103.
APA, 6th edition
Wat, Aleksander, 1900-1967. (["Box 30, folder 712-715"])(1953 or 1954)["Notatniki I, II," notebooks]. https://collections.library.yale.edu/catalog/10512103.