Cita APA (7a ed.)

Howard, A. E., Farmer, W., & Blackman, R. A. (1968). Teaching mathematics. Longmans.

Cita Chicago Style (17a ed.)

Howard, Alexander Edward, Wilfred Farmer, y Ronald Albert Blackman. Teaching Mathematics. [London]: Longmans, 1968.

Cita MLA (8a ed.)

Howard, Alexander Edward, et al. Teaching Mathematics. Longmans, 1968.