Gaya APA
Hastings, B., Mckinlay, S. (2017).
Wider World "Special Edition" : Students' Book 1 (1).
Singapore:
Pearson Education Limited.
Gaya MLA
Hastings, Bob., Mckinlay, Stuart.
"Wider World "Special Edition" : Students' Book 1".
1
Singapore:
Pearson Education Limited,
2017.
Text.