Gaya APA
Butar, A, J, R, B. (2018).
Khazanah Astronomi Islam Abad Pertengahan .
Purwokerto:
UM Purwokerto Press.
Gaya MLA
Butar, Arwin, Juli, Rakhmadi, Butar.
"Khazanah Astronomi Islam Abad Pertengahan".
Purwokerto:
UM Purwokerto Press,
2018.
Buku Tex.