Beautiful Mantra addressed to Shreemati Tulasi-Devi from "Shree SadhanAmrita-Chandrika" (one of The Agamas of Shree Gaudiya-Sampradaya):
Cited from "Shree SadhanAmrita-Chandrika" -
The only Pramana which exists for me is just "Shree Lakshmi-Tantra", the Only Adored Goddess is Shreemati Lakshmi-Devi