Cite

[Four naive watercolors] [art original].

MLA

[Four Naive Watercolors] [Art Original]. 0AD. https://collections.library.yale.edu/catalog/17332069.

APA, 6th edition

[Four naive watercolors] [art original]. (0 C.E.). [Periodicals, Illustrations, Watercolors, Amateur works, Printed waste (Binding)]. https://collections.library.yale.edu/catalog/17332069.