Boltwood, H. L. (1886). A topical outline of general history: Designed as a guide to the general reader and for review work in schools. Scott, Foresman & Co..
Chicago-referens (17:e uppl.)Boltwood, Henry L. A Topical Outline of General History: Designed as a Guide to the General Reader and for Review Work in Schools. Chicago: Scott, Foresman & Co., 1886.
MLA-referens (8:e uppl.)Boltwood, Henry L. A Topical Outline of General History: Designed as a Guide to the General Reader and for Review Work in Schools. Scott, Foresman & Co., 1886.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.