Summerhill, K. S. (1994). The High Cost of Reference: The Need to Reassess Services and Service Delivery.
Citazione stile Chigago Style (17a edizione)Summerhill, Karen Storin. The High Cost of Reference: The Need to Reassess Services and Service Delivery. 1994.
Citatione MLA (9a ed.)Summerhill, Karen Storin. The High Cost of Reference: The Need to Reassess Services and Service Delivery. 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.