Citação norma APA

Research Publications, inc. (1983). City directories of the United States, pre-1860 through 1901: Guide to the microfilm collection. Research Publications.

Citação norma Chicago

Research Publications, inc. City Directories of the United States, Pre-1860 Through 1901: Guide to the Microfilm Collection. Woodbridge, CT: Research Publications, 1983.

Citação norma MLA

Research Publications, inc. City Directories of the United States, Pre-1860 Through 1901: Guide to the Microfilm Collection. Research Publications, 1983.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.