APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Howard, Alexander E., Wilfred Famer, and Ronald A. Blackman. Teaching Mathematics. London: Longmans, 1968.

MLA (9th ed.) Citation

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