APA (7th ed.) Citation

International Hydrological Programme. Working Group of Project 4.4b(IHP-III), Unesco, & Tuin, H. v. d. (1991). Guidelines on the study of seawater intrusion into rivers. Unesco.

Chicago Style (17th ed.) Citation

International Hydrological Programme. Working Group of Project 4.4b(IHP-III), Unesco, and H. van der Tuin. Guidelines on the Study of Seawater Intrusion into Rivers. Paris: Unesco, 1991.

MLA (9th ed.) Citation

International Hydrological Programme. Working Group of Project 4.4b(IHP-III), et al. Guidelines on the Study of Seawater Intrusion into Rivers. Unesco, 1991.