Cite

Postcards, promotional material for others, programs, periodicals

MLA

Hammer, Barbara. Postcards, Promotional Material for Others, Programs, Periodicals. 0AD. https://collections.library.yale.edu/catalog/17463454.

APA, 6th edition

Hammer, B. (0 C.E.). Postcards, promotional material for others, programs, periodicals. https://collections.library.yale.edu/catalog/17463454.