Q. Can WordNet generate plural forms and other inflected forms?
A. No. The morphological component of the WordNet library is unidirectional. Along with a set of irregular forms (e.g. children - child), it uses a sequence of simple rules, stripping common English endings until it finds a word form present in WordNet. Furthermore, it assumes its input is a valid inflected form. So, it will take "childes" to "child", even though "childes" is not a word.
Q. How do I cite WordNet?
A. Go here