R. B., M. o. A. (1649). Arithmetick symbolical: In one book : in which the mystery of numeration by symbols is revealed. Printed for A. Crook ....
Chicago-referens (17:e uppl.)R. B., Mr. of Arts. Arithmetick Symbolical: In One Book : In Which the Mystery of Numeration by Symbols Is Revealed. London: Printed for A. Crook ..., 1649.
MLA-referens (8:e uppl.)R. B., Mr. of Arts. Arithmetick Symbolical: In One Book : In Which the Mystery of Numeration by Symbols Is Revealed. Printed for A. Crook ..., 1649.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.