Gaya APA
Cowell, G. (2019).
The Wizard of Once : Knock Three Times = Ketuk tiga kali (Cetakan I).
Jakarta:
Mahaka Publishing.
Gaya MLA
Cowell, Gressida.
"The Wizard of Once : Knock Three Times = Ketuk tiga kali".
Cetakan I
Jakarta:
Mahaka Publishing,
2019.
Text.