Gaya APA
Barry, M. et al (2014).
Practice Tests for IGCSE English as a Second Language : Reading and Writing Book 1 .
Inggris:
Cambridge.
Gaya MLA
Barry, Marian. et al.
"Practice Tests for IGCSE English as a Second Language : Reading and Writing Book 1".
Inggris:
Cambridge,
2014.
Text.