Ward, S. M., Freeman, R. S., & Nixon, J. M. (2016). Academic e-books: Publishers, librarians, and users. Purdue University Press.
Citazione stile Chigago Style (17a edizione)Ward, Suzanne M., Robert S. Freeman, e Judith M. Nixon. Academic E-books: Publishers, Librarians, and Users. West Lafayette, Indiana: Purdue University Press, 2016.
Citatione MLA (9a ed.)Ward, Suzanne M., et al. Academic E-books: Publishers, Librarians, and Users. Purdue University Press, 2016.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.