International Conference on Geotextiles Geomembranes and Related Products : Hague & Hoedt, G. d. (1990). Geotextiles, geomembranes and related products: Proceedings of the 4th international conference on geotextiles, geomembranes and related productus/The Hague/28 May - 1 June 1990. A. A. Balkema.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Conference on Geotextiles Geomembranes and Related Products : Hague και G. den Hoedt. Geotextiles, Geomembranes and Related Products: Proceedings of the 4th International Conference on Geotextiles, Geomembranes and Related Productus/The Hague/28 May - 1 June 1990. Rotterdam; Brookfield: A. A. Balkema, 1990.
Παραπομπή σε μορφή MLA (9th εκδ.)International Conference on Geotextiles Geomembranes and Related Products : Hague και G. den Hoedt. Geotextiles, Geomembranes and Related Products: Proceedings of the 4th International Conference on Geotextiles, Geomembranes and Related Productus/The Hague/28 May - 1 June 1990. A. A. Balkema, 1990.