Cite

[Six greeting cards published by L. Prang & Co., 1875]

MLA

[Six Greeting Cards Published by L. Prang & Co., 1875]. 0AD. https://collections.library.yale.edu/catalog/10602793.

APA, 6th edition

[Six greeting cards published by L. Prang & Co., 1875]. (0 C.E.). [Greeting cards]. https://collections.library.yale.edu/catalog/10602793.