Needham, G., & Johnson, K. (2007). Ethical Issues in Providing Library Services to Distance Learners.
Citazione stile Chigago Style (17a edizione)Needham, Gill, e Kay Johnson. Ethical Issues in Providing Library Services to Distance Learners. 2007.
Citatione MLA (9a ed.)Needham, Gill, e Kay Johnson. Ethical Issues in Providing Library Services to Distance Learners. 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.