APA
Leong Goh Cheng,, . (2011). Certificate physical and human geography. New Delhi: Oxford University Press.
Chicago
Leong Goh Cheng,, . 2011. Certificate physical and human geography. New Delhi: Oxford University Press.
Harvard
Leong Goh Cheng,, . (2011). Certificate physical and human geography. New Delhi: Oxford University Press.
MLA
Leong Goh Cheng,, . Certificate physical and human geography. New Delhi: Oxford University Press. 2011.