Preservation and publication :
proceedings of a seminar at York University, 17-18 July 1990.

APA Citation

British Library. National Preservation Office. (1991). Preservation and publication: proceedings of a seminar at York University, 17-18 July 1990. London: National Preservation Office, British Library.

MLA Citation

British Library. National Preservation Office. Preservation And Publication: Proceedings of a Seminar At York University, 17-18 July 1990. London: National Preservation Office, British Library, 1991.

Warning: These citations may not always be complete (especially for serials).