This excellent anthology series is a good source for reference, study, and performance.
Journal of Singing (National Association of Teachers of
Singing), May 2010
These books offer a very valuable learning experience; they are very carefully thought out, and offer the best introduction to singing in other languages that I have come across. If I mention the fact that nearly all the pieces are to be found in the examination syllabi of the ABRSM and the Trinity Guildhall, do not be tempted to look at them simply as exam material. This very practical consideration means that the books may well be bought with a specific exam piece in mind, but they will then be used and studied by both teachers and students long after.
Singing Magazine (Association of Teachers of Singing), Winter 2006