MLA

Durand, Maurice M., 1966-. Song Phu Kỳ Duyên, AB 399, Nôm [Slightly different version]. Box 12, folder 122. Circa 1700-circa 1900. https://collections.library.yale.edu/catalog/10923537.

APA, 6th edition

Durand, Maurice M., 1966-. (["Box 12, folder 122"])(Circa 1700-circa 1900)[Song Phu Kỳ Duyên, AB 399, Nôm [Slightly different version]]. https://collections.library.yale.edu/catalog/10923537.