29 June may be observed as the Festival of Peter and Paul, or as the Festival of Peter, alone.

If 29 June is observed as the Festival of Peter, alone:

Peter, Apostle

http://almanac.oremus.org/2019-06-29

Principal Service
Ezekiel 3.22-27
Psalm 125
Acts 12.1-11
Matthew 16.13-19

(or)
Acts 12.1-11
Psalm 125
1 Peter 2.19-25
Matthew 16.13-19

Third Service
Isaiah 49.1-6
Acts 11.1-18
Morning Psalms
Psalms 71, 113

Second Service
Ezekiel 34.11-16
John 21.15-22
Evening Psalms
Psalms 124, 138

BCP Collect

O Almighty God, who by thy Son Jesus Christ didst give to thy Apostle Saint Peter many excellent gifts, and commandedst him earnestly to feed thy flock; Make, we beseech thee, all Bishops and Pastors diligently to preach thy holy Word, and the people obediently to follow the same, that they may receive the crown of everlasting glory; through Jesus Christ our Lord.