Levy, v., Roch, s., & Alexander, j. (1995). Aspects of midwifery practice: A research based approach. Macmillan Press.

Levy, valerie, sarah Roch, and jo Alexander. Aspects of Midwifery Practice: A Research Based Approach. Macmillan Press, 1995.

Levy, valerie, et al. Aspects of Midwifery Practice: A Research Based Approach. Macmillan Press, 1995.