Gaya APA
Anies, .
(2021).
Waspada Penularan Covid-19 Varian Delta
(
Cet. 1)
.
Yogyakarta:
Arruz Media.
Gaya MLA
Anies, .
"Waspada Penularan Covid-19 Varian Delta".
Cet. 1
Yogyakarta:
Arruz Media,
2021.
Buku.