One of

Euthanasia may be one of ways to deliver health resources fairly to people who still want to live.

This is a direct translation from Bahasa Indonesia: salah satu.

For every noun in English it is important to communicate one of three meanings:

One of many
All of them everywhere
This one exactly

In the opening example the writer communicated successfully. However, the sentence is gramatically incorrect. If you really must use one of then you need more grammar:

Euthanasia may be one of several ways to deliver..
('several' behaves like 'many')

Euthanasia may be one of the best ways to deliver..
('one of' + the + superlative adjective + plural count noun)

You can see how easy it can be to introduce grammatical error, or to choose the wrong word to follow one of! A much easier and far more common way to communicate one of many is using the indefinite article a (or an) - NOT one of.

Want to communicate one of many? Use the indefinite article:

Euthanasia may be a way to deliver health resources fairly to people who still want to live.