MLA

Allied Land Forces. South-East Asia. Directorate of Surveys, Great Britain. Army. Royal Engineers. Indian Field Survey Company, 4th. Town plan of Langsa / surveyed and drawn by No. 4 Ind. Fd. Survey Coy., I.E.. BRBL_00023C. 1944. https://collections.library.yale.edu/catalog/15238583.

APA, 6th edition

Allied Land Forces. South-East Asia. Directorate of Surveys, & Great Britain. Army. Royal Engineers. Indian Field Survey Company, 4th. (["BRBL_00023C"])(1944)[Town plan of Langsa / surveyed and drawn by No. 4 Ind. Fd. Survey Coy., I.E.]. https://collections.library.yale.edu/catalog/15238583.