Gaya APA

Grant, C, B, D, S. (2013). Cambridge International AS and A Level Economics Second Edition (Cet. 2). : 9.78052E+12.

Gaya MLA

Grant, Colin, Bamford, Dan, Susan. "Cambridge International AS and A Level Economics Second Edition". Cet. 2 : 9.78052E+12, 2013. Text.