Cite

Calligraphic Exercise (unknown edition size)

MLA

Van Horn, Erica. Calligraphic Exercise (Unknown Edition Size). 1979. https://collections.library.yale.edu/catalog/2056700.

APA, 6th edition

Van Horn, E. (1979). Calligraphic Exercise (unknown edition size). https://collections.library.yale.edu/catalog/2056700.