Washington Researchers, Glennon, M., & Hill, T. (1981). Researcher's guide to Washington experts. Washington Researchers.
Citazione stile Chigago Style (17a edizione)Washington Researchers, Michael Glennon, e Thomas Hill. Researcher's Guide to Washington Experts. Washington, D. C: Washington Researchers, 1981.
Citatione MLA (9a ed.)Washington Researchers, et al. Researcher's Guide to Washington Experts. Washington Researchers, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.