Gaya APA
Cory, Kate, Harmes, Sue. (2020).
Our World Student Book 4 (Student Book Second Edition).
USA:
National Geographic Learning.
Gaya Chicago
Cory, Kate, Harmes, Sue.
Our World Student Book 4.
Student Book Second Edition
USA:
National Geographic Learning,
2020.
Text.
Gaya MLA
Cory, Kate, Harmes, Sue.
Our World Student Book 4.
Student Book Second Edition
USA:
National Geographic Learning,
2020.
Text.
Gaya Turabian
Cory, Kate, Harmes, Sue.
Our World Student Book 4.
Student Book Second Edition
USA:
National Geographic Learning,
2020.
Print.