Cita APA (7th ed.)
Ellerton, N. F., & Clements, M. Abraham Lincoln’s Cyphering Book and Ten other Extraordinary Cyphering Books. Springer.
Cita Chicago (17th ed.)
Ellerton, Nerida F., i M.A Clements. Abraham Lincoln’s Cyphering Book and Ten Other Extraordinary Cyphering Books. Cham, Suiza: Springer.
Cita MLA (9th ed.)
Ellerton, Nerida F., i M.A Clements. Abraham Lincoln’s Cyphering Book and Ten Other Extraordinary Cyphering Books. Springer.
Atenció: Aquestes cites poden no estar 100% correctes.