A.E. Wright's Boston, New York, Philadelphia & Baltimore commercial directory, and general advertising medium.
APA Citation
Wright, A. (1840). A.E. Wright's Boston, New York, Philadelphia & Baltimore commercial directory, and general advertising medium. New York & Philadelphia.
MLA Citation
Wright, A.E., Firm, Publishers, New York. A.E. Wright's Boston, New York, Philadelphia & Baltimore Commercial Directory, And General Advertising Medium. New York & Philadelphia, 1840.
Warning: These citations may not always be complete (especially for serials).