Ferris, D., & Poelsma, D. (1977). Homosexuality and the Social Services: The report of an NCCL survey of Local Authority Social Service Committees / Dave Ferris. Illustrations by Dominic Poelsma. Cover Design by Alternative Design Group, Society of Industrial Artists and Designers. National Council for Civil Liberties.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ferris, Dave, و Dominic Poelsma. Homosexuality and the Social Services: The Report of an NCCL Survey of Local Authority Social Service Committees / Dave Ferris. Illustrations by Dominic Poelsma. Cover Design by Alternative Design Group, Society of Industrial Artists and Designers. Chesham: National Council for Civil Liberties, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ferris, Dave, و Dominic Poelsma. Homosexuality and the Social Services: The Report of an NCCL Survey of Local Authority Social Service Committees / Dave Ferris. Illustrations by Dominic Poelsma. Cover Design by Alternative Design Group, Society of Industrial Artists and Designers. National Council for Civil Liberties, 1977.