3.3.1.1. Video: PL Cluster Pronunciation | English Pronunciation - YouTube - https://www.youtube.com/watch?v=3k7jN4kX4U

3.3.1.2. Video: How to Pronounce PL Clusters - YouTube - https://www.youtube.com/watch?v=0z1gT2g3w5s

3.3.1.3. Article: English Consonant Clusters: PL - Pronunciation Studio - https://pronunciationstudio.com/pl-clusters/

3.3.1.4. Article: Consonant Clusters in English - Hadar Shemesh - https://hadarshemesh.com/magazine/consonant-clusters/