Engle, M. O. (1986). Librarianship as Calling: The Philosophy of College Librarianship.
Citazione stile Chigago Style (17a edizione)Engle, Michael O. Librarianship as Calling: The Philosophy of College Librarianship. 1986.
Citatione MLA (9a ed.)Engle, Michael O. Librarianship as Calling: The Philosophy of College Librarianship. 1986.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.