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.