Dyfyniad APA

Spear, D. N. (1961). Bibliography of American directories through 1860. American Antiquarian Society.

Dyfyniad Arddull Chicago

Spear, Dorothea N. Bibliography of American Directories Through 1860. Worcester, Mass.: American Antiquarian Society, 1961.

Dyfyniad MLA

Spear, Dorothea N. Bibliography of American Directories Through 1860. American Antiquarian Society, 1961.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.