Wasserman, P., Allen, E. B., & Georgi, C. (1971). Statistics sources: A subject guide to data on industrial, business, social, educational, financial, and other topics for the United States and selected foreign countries (Rev. 3d ed.). Gale Research Co..
Cita Chicago (17th ed.)Wasserman, Paul, Eleanor B. Allen, i Charlotte Georgi. Statistics Sources: A Subject Guide to Data on Industrial, Business, Social, Educational, Financial, and Other Topics for the United States and Selected Foreign Countries. Rev. 3d ed. Detroit: Gale Research Co., 1971.
Cita MLA (8th ed.)Wasserman, Paul, et al. Statistics Sources: A Subject Guide to Data on Industrial, Business, Social, Educational, Financial, and Other Topics for the United States and Selected Foreign Countries. Rev. 3d ed. Gale Research Co., 1971.