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