Shaamash, A. H., Alshahrani, M. S., Awadalla, N. J., & Hakami, H. W. (2015). Falling in serum β human chorionic gonadotropin levels between days 1 and 7 as a new protocol to predict successful single-dose of methotrexate therapy for ectopic pregnancy. Middle East Fertility Society Journal, 20(3), 159. https://doi.org/10.1016/j.mefs.2014.11.001
Chicago Style (17th ed.) CitationShaamash, A. H., M. S. Alshahrani, N. J. Awadalla, and H. W. Hakami. "Falling in Serum β Human Chorionic Gonadotropin Levels Between Days 1 and 7 as a New Protocol to Predict Successful Single-dose of Methotrexate Therapy for Ectopic Pregnancy." Middle East Fertility Society Journal 20, no. 3 (2015): 159. https://doi.org/10.1016/j.mefs.2014.11.001.
MLA (9th ed.) CitationShaamash, A. H., et al. "Falling in Serum β Human Chorionic Gonadotropin Levels Between Days 1 and 7 as a New Protocol to Predict Successful Single-dose of Methotrexate Therapy for Ectopic Pregnancy." Middle East Fertility Society Journal, vol. 20, no. 3, 2015, p. 159, https://doi.org/10.1016/j.mefs.2014.11.001.