Fourth International Conference on Minority Languages /
edited by Durk Gorter ... [et al.].

APA Citation

International Conference on Minority Languages (4th : 1989 : Leeuwarden, N., Gorter, D. (Durk). (1990). Fourth International Conference on Minority Languages. Clevedon: Multilingual Matters.

MLA Citation

International Conference on Minority Languages (4th : 1989 : Leeuwarden, Netherlands), and D. (Durk) Gorter. Fourth International Conference On Minority Languages. Clevedon: Multilingual Matters, 1990.

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