Gibbons, J. (1870). Circular: To the Officers and Members of the F.B., February 28, 1870.
Chicago-referens (17:e uppl.)Gibbons, James. Circular: To the Officers and Members of the F.B., February 28, 1870. 1870.
MLA-referens (8:e uppl.)Gibbons, James. Circular: To the Officers and Members of the F.B., February 28, 1870. 1870.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.