Cite

Map of British Honduras, drawn and compiled from various sources by E. Lassen, 1911.

MLA

Lassen, E. Map of British Honduras, Drawn and Compiled from Various Sources by E. Lassen, 1911. Ordnance Survey Office, 1921. https://collections.library.yale.edu/catalog/15822435.

APA, 6th edition

Lassen, E. (1921). Map of British Honduras, drawn and compiled from various sources by E. Lassen, 1911. [Maps]. Ordnance Survey Office, https://collections.library.yale.edu/catalog/15822435.