“I believe in God, the Father almighty, Creator of heaven and earth, and in Jesus Christ, his only Son, our Lord,” - Apostles’ Creed
“I believe in one Lord Jesus Christ, the Only Begotten Son of God, born of the Father before all ages.” - Nicene Creed
“I believe in the Holy Spirit, the Lord, the giver of life,” - Nicene Creed
“Lord God, heavenly King, O God, almighty Father. Lord Jesus Christ, Only Begotten Son, Lord God, Lamb of God, Son of the Father,” - The Gloria
Lord can refer to all Persons of the Trinity or individual Persons of the Trinity.