1. Cunningham FG, Leveno KJ, Bloom SL, et al. Williams obstetrics. In: Labour induction. 24th ed. McGraw Hill: New York; 2014. p. 523–4.
2. Arias F, Daftary SN, Bhide AG. Practical guide to high risk pregnancy and delivery. In: Bhide A, Arulkumaran S, editors. Abnormal labour and delivery. 3rd ed. Amsterdam: Elsevier; 2008. p 373–90.
3. Khatri R, Sharma J, Amatya A. Oral, vaginal misoprostol: which route for induction of term labor? N J Obstet Gynaecol. 2007;2(1):23–8.
4. Rasheed R, Alam AA, Younus SR. Oral versus vaginal misoprostol for labour induction. J Pak Med Assoc. 2007;57(8):404–7.
5. Emmaneul PC, Ugwu EO, Obi SN, et al. Oral versus vaginal misoprostol for induction of labor in Enugu, Nigeria. Arch Gynaecol Obstetr. 2015;291(3):537–44.