@incollection{:/content/books/9789210552936s009-c004, author = "United Nations", title = "Model instrument of ratification, acceptance or approval", booktitle = "Treaty Handbook", publisher = "United Nations", year = "2012", pages = "52-52", url = "https://www.un-ilibrary.org/content/books/9789210552936s009-c004" }