Gaya APA
Kusumo, M, P.
(2020).
BUKU LANSIA
.
Yogyakarta:
LPPM UMY.
Gaya MLA
Kusumo, Mahendro, Prasetyo.
"BUKU LANSIA".
Yogyakarta:
LPPM UMY,
2020.
Electronik Book.