APA Style

L.Hoffm, F, C, J, L, L, Y, J, S, D, B. (). Williams Obstetrics_ 25th Edition 2018 (25th edition). : .

MLA Style

L.Hoffm, F.Gary, Cunningham,Kenneth, J., Leveno,Steven, L.Bloom,Catherine, Y.Spong,, Jodi, S., Dashe,, Barbara. "Williams Obstetrics_ 25th Edition 2018". 25th edition : , . Text.