Lankes, R. D., Gross, M., & McClure, C. R. (2003). Cost, Statistics, Measures, and Standards for Digital Reference Services: A Preliminary View.
Citazione stile Chigago Style (17a edizione)Lankes, R. David, Melissa Gross, e Charles R. McClure. Cost, Statistics, Measures, and Standards for Digital Reference Services: A Preliminary View. 2003.
Citatione MLA (9a ed.)Lankes, R. David, et al. Cost, Statistics, Measures, and Standards for Digital Reference Services: A Preliminary View. 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.