Simple English Proper (Lumen Christi Gradual and Modal Responsorial Psalms). The Roman Missal gives us these Bible verses to be sung per the examples recorded: the congregation joins the cantor for the antiphon (printed), then the cantor sing the Psalm alone, then the congregation and cantor repeat the antiphon.
Roman Gradual: Propers in Latin are identical in both Ordinary and Extraordinary Form of the Roman Rite.
Ordinary Form of the Roman Rite
Download pages of the Gregorian Missal: GM Trinity Sunday
Download proper in English (same Gregorian mode): OTHT proper ENG PW
Responsorial (see “simple proper” above), or Gradual (cantor or schola alone)
Extraordinary Form of the Roman Rite
Download pages of Mass & Vespers 1957: MV57-PT00 Trinity Sunday
or Liber Usualis 1961: libUs-Trinity S