A citation network analysis among four journals in human resource development (HRD) was conducted to discover the major themes of published articles in HRD. A total of 1,410 articles from 1990 to 2007 were coded. Main path analysis, influence analysis, and reduced network analysis were conducted for citation network analysis. The key findings are (1) The HRD citation network is characterized as high cohesiveness locally and low separation globally; (2) HRD texts tend to gather around texts dealing with three significant topics; (3) A reduced citation network generated based on cliques is divided into four blocks; and (4) A geographical position of a text in the citation network is highly associated with the topics (theory building or training transfer) and with the nature of the study (foundational or applied). Implications of the current study and suggestions for future study based on the limitations of the study are addressed. (Contains 13 tables and 5 figures.)