They were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance. –Acts 2:4 (KJV)

On the Gentiles also was poured out the gift of the Holy Ghost. For they heard them speak with tongues, and magnify God. –Acts 10:45-46 (KJV)

When Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied. –Acts 19:6 (KJV)

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P. C. Nelson, Bible Doctrines, ch. 8: “The Evidence of the Baptism in the Holy Spirit.”

Harold Horton, The Gifts of the Spirit.

John Sherrill, They Speak with Other Tongues.

French Arrington, Christian Doctrine. Vol. 3, pp. 63-65.

Augustin Poulain, The Graces of Interior Prayer, ch. 5. (1910).