APA Style
Mariam, A. (2012).
O Level Topical Geography: Past Examination Questions Arranged By Topics Years 2002-2011 .
Singapore:
SAP Education.
MLA Style
Mariam, Alias.
"O Level Topical Geography: Past Examination Questions Arranged By Topics Years 2002-2011".
Singapore:
SAP Education,
2012.
Reference.