I have done SCWCD certification recently and wanted to do Web Services Certification. I just want to know which book I should refer to.
Thanks in advance.
This questions has been asked many-many times already here.
1) There is NO single study guide book for SCDJWS like K&B for SCJP or HF S&JSP for SCWCD.
2) Please, look at the links page for the study sources to refer.
3) Use search on this forum for preparation experience of other beginners.
Java Platform, Enterprise Edition 6 Web Services Developer Certified Expert Exam Study Guide and Quiz Exam 1Z0-810: Upgrade to Java SE 8 Programmer Study Guide and Quiz