A complicating factor has been the continuing lack of specialized one-volume referenceworks on Asian Americans, such as biographical dictionaries or desktop encyclopedias.
一个复杂的因素是，一直缺乏专门针对亚裔美国人的一卷参考著作，如传记词典或台式百科全书。
2
Surely referenceworks need to be compiled by experts?
参考书一定要由专家编写么？
3
In scientific disciplines, a student begins by studying general referenceworks such as text books.