Boston Subway, East Boston Tunnel, Washington St. Tunnel, tunnel for Cambridge connection, Dorchester Tunnel, Boylston St. Subway & East Boston Tunnel Connection.
MLA
Boston Subway, East Boston Tunnel, Washington St. Tunnel, Tunnel for Cambridge Connection, Dorchester Tunnel, Boylston St. Subway & East Boston Tunnel Connection. Boston Transit Commission, 1918. https://collections.library.yale.edu/catalog/15827571.
APA, 6th edition
Boston Subway, East Boston Tunnel, Washington St. Tunnel, tunnel for Cambridge connection, Dorchester Tunnel, Boylston St. Subway & East Boston Tunnel Connection. (1918). [Maps]. Boston Transit Commission, https://collections.library.yale.edu/catalog/15827571.
