Needles, E. (1848). An historical memoir of the Pennsylvania Society for Promoting the Abolition of Slavery; the Relief of Free Negroes Unlawfully held in Bondage and for Improving the Condition of the African Race. Philadelphia: Merrihew and Thompson, printers.

Needles, Edward. An Historical Memoir of the Pennsylvania Society for Promoting the Abolition of Slavery; the Relief of Free Negroes Unlawfully Held in Bondage and for Improving the Condition of the African Race. Philadelphia: Merrihew and Thompson, printers, 1848.

Needles, Edward. An Historical Memoir of the Pennsylvania Society for Promoting the Abolition of Slavery; the Relief of Free Negroes Unlawfully Held in Bondage and for Improving the Condition of the African Race. Philadelphia: Merrihew and Thompson, printers, 1848.