Cite

H1863: A slate 21 cm. x 16 cm., of white porcelain framed in black leather, with a sheath for a pencil

MLA

Gimbel, Richard. H1863: A Slate 21 Cm. x 16 Cm., of White Porcelain Framed in Black Leather, with a Sheath for a Pencil. 0AD. https://collections.library.yale.edu/catalog/16683561.

APA, 6th edition

Gimbel, R. (0 C.E.). H1863: A slate 21 cm. x 16 cm., of white porcelain framed in black leather, with a sheath for a pencil. https://collections.library.yale.edu/catalog/16683561.