Cite a hymn in a hymnal as you would a poem in a collection:

Conder, Josiah. “Bread of heaven, on thee we feed.” The Hymnal 1982, Church Hymnal, 1985, p. 543. Hymnary.org, hymnary.org/hymn/EH1982/page/543.

In the example above, the author of the hymn is Josiah Conder, and the title is “Bread of heaven, on thee we feed.” (Note that the title is capitalized in the style of a sentence, because the title is the first line of the hymn.) The hymn is found in a hymnal entitled The Hymnal 1982, which is listed as the container, and it was published by Church Hymnal in 1985. This particular hymnal was consulted on a website, Hymnary.org, at the URL at the end of the entry.