APA
(2012). Certificate business studies form 4 student's book. : Oxford University Press East Africa Limited.
Chicago
2012. Certificate business studies form 4 student's book. : Oxford University Press East Africa Limited.
Harvard
(2012). Certificate business studies form 4 student's book. : Oxford University Press East Africa Limited.
MLA
Certificate business studies form 4 student's book. : Oxford University Press East Africa Limited. 2012.