Merz 6, Okt 1923. Jmitatoren watch step!
MLA
Schwitters, Kurt, 1887-1948. Merz 6, Okt 1923. Jmitatoren watch step!. 1923 October. https://collections.library.yale.edu/catalog/10186861.
APA, 6th edition
Schwitters, Kurt, 1887-1948. (1923 October)[Merz 6, Okt 1923. Jmitatoren watch step!]. https://collections.library.yale.edu/catalog/10186861.