Cite

[Outline map of the capital Co-loa, North Vietnam]

MLA

[Outline Map of the Capital Co-Loa, North Vietnam]. s.n., 0AD. https://collections.library.yale.edu/catalog/15511918.

APA, 6th edition

[Outline map of the capital Co-loa, North Vietnam]. (0 C.E.). [Maps]. s.n., https://collections.library.yale.edu/catalog/15511918.