APA

GOUWS S., . (2009). Learning English 9 Class: Class 9 exercise book. Maputo: .

Chicago

GOUWS Sonia, . 2009. Learning English 9 Class: Class 9 exercise book. Maputo: .

Harvard

GOUWS S., . (2009). Learning English 9 Class: Class 9 exercise book. Maputo: .

MLA

GOUWS Sonia, . Learning English 9 Class: Class 9 exercise book. Maputo: . 2009.