APA (7th ed.) Citation

Armstrong, D. 1. J. 3., Calnan, M., & Grace, J. (1990). Research methods for general practitioners. Oxford University Press.

Chicago Style (17th ed.) Citation

Armstrong, David 1947 June 3-, Michael Calnan, and John Grace. Research Methods for General Practitioners. Oxford: Oxford University Press, 1990.

MLA (9th ed.) Citation

Armstrong, David 1947 June 3-, et al. Research Methods for General Practitioners. Oxford University Press, 1990.