Cita APA (7a ed.)
Letchford, S. (1977). Business mathematics and statistics (2nd.ed.). Donnington.
Cita Chicago Style (17a ed.)
Letchford, S. Business Mathematics and Statistics. 2nd.ed. London: Donnington, 1977.
Cita MLA (9a ed.)
Letchford, S. Business Mathematics and Statistics. 2nd.ed. Donnington, 1977.
Precaución: Estas citas no son 100% exactas.