Gaya APA
Cowel, C. et al (2019).
The wizards of once : ketuk tiga kali : Knock three times (edisi 1).
Jakarta:
Mahaka Publishing.
Gaya MLA
Cowel, Cressida. et al.
"The wizards of once : ketuk tiga kali : Knock three times".
edisi 1
Jakarta:
Mahaka Publishing,
2019.
Text.