Hilton, M. (1993). Assessing the quality of service: Facilitator's guide. Aga Khan Foundation.
Lua i Stíl Chicago (17ú heag.)Hilton, Martine. Assessing the Quality of Service: Facilitator's Guide. Washington, DC: Aga Khan Foundation, 1993.
Lua MLA (8ú heag.)Hilton, Martine. Assessing the Quality of Service: Facilitator's Guide. Aga Khan Foundation, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.