Citazione APA

Michigan Historical Commission & Dunbar, W. F. (1967). Michigan historical markers ([Rev. ed.].). Michigan Historical Commission.

Stile di citazione Chicago

Michigan Historical Commission e Willis Frederick Dunbar. Michigan Historical Markers. [Rev. ed.]. Lansing: Michigan Historical Commission, 1967.

Citazione MLA

Michigan Historical Commission e Willis Frederick Dunbar. Michigan Historical Markers. [Rev. ed.]. Michigan Historical Commission, 1967.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.