Gilasi, H. R., H. Akbari, F. Darvishi, Z. Kazemi, Z. Gharlipour, and M. Heidarian. “The Relationship Between Prevention Methods and Unwanted Pregnancy”. Advances in Nursing & Midwifery, vol. 22, no. 79/s, Dec. 2013, https://journals.sbmu.ac.ir/en-jnm/article/view/5407.