1962, “Evidence”, in (Please provide the book title or journal name), page 48:
Whazza mattuh, yo have a big fight with yo brudder-n-sustah?
1994, Najeeba Jaja, Riper the Berry, Sweeter…: Nine Keys to Greater Success, page 122:
An advocate of polygamy said, “Sustah, want for ya sustah what ya want for yourself. The sustah’s response was, “Yeah, I want my sustah to have her own husband; not mine.”
2021, Damus Amazulu Kenjyatta, The Foggy Bottom Storytellers at the Port of Poets:
Four-year-old Wealthy had, since birth, been called and known as Sustah (sister).