Gaya APA

dkk, C, T. (2020). Keakhawatan 4 (Cet. 4). : Era Adicitra Intermedia.

Gaya MLA

dkk, Cahyadi, Takariawan,. "Keakhawatan 4". Cet. 4 : Era Adicitra Intermedia, 2020. BUKU CETAK (PRINTED BOOK).