You can listen to the bhajan and learn how to sing it yourself. The words and their meaning are below along with the chords for harmonium accompaniment.
Bhajan # 126 in the Premananda Bhajans book
Gurujī, Your form is that of Brahmā, Vishṇu and Shiva. Your divine energy is love itself. True Guru, great master, glory to You, I surrender to You, always. Sing the glory of our Gurudēva Swami Premananda.