Gaya APA

Anies, . (2021). Waspada Penularan Covid - 19 Varian Delta (I). Yogyakarta: Ar-Ruzz Media.

Gaya MLA

Anies, . "Waspada Penularan Covid - 19 Varian Delta". I Yogyakarta: Ar-Ruzz Media, 2021. Text.