Hardy, G. J., & Robinson, J. S. (1990). Reference Services to Students: A Crucible for Ethical Inquiry.
Citazione stile Chigago Style (17a edizione)Hardy, Gayle J., e Judith Schiek Robinson. Reference Services to Students: A Crucible for Ethical Inquiry. 1990.
Citatione MLA (9a ed.)Hardy, Gayle J., e Judith Schiek Robinson. Reference Services to Students: A Crucible for Ethical Inquiry. 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.