University of Sheffield. Centre for Research on User Studies & Ford, G. (1978). Report of the director: For the period 1st November 1975-28th February 1978. University of Sheffield, Centre for Research on User Studies.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)University of Sheffield. Centre for Research on User Studies và Geoffrey Ford. Report of the Director: For the Period 1st November 1975-28th February 1978. Sheffield: University of Sheffield, Centre for Research on User Studies, 1978.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)University of Sheffield. Centre for Research on User Studies và Geoffrey Ford. Report of the Director: For the Period 1st November 1975-28th February 1978. University of Sheffield, Centre for Research on User Studies, 1978.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.