Young, M. L. S. a. t. l. (1989). Science and engineering libraries including agriculture, biological sciences, computer science, energy, environment/conservatin, and food sciences libraries (12th ed.). Gale Research.
Chicago-referens (17:e uppl.)Young, Margaret Labash. Science and technology libraries. Science and Engineering Libraries Including Agriculture, Biological Sciences, Computer Science, Energy, Environment/conservatin, and Food Sciences Libraries. 12th ed. Detroit: Gale Research, 1989.
MLA-referens (9:e uppl.)Young, Margaret Labash. Science and technology libraries. Science and Engineering Libraries Including Agriculture, Biological Sciences, Computer Science, Energy, Environment/conservatin, and Food Sciences Libraries. 12th ed. Gale Research, 1989.