When deciding which referencing system to use, there are some guidelines to follow. Please select from the following the incorrect one. 
A、If there is no such common standard, then use the referencing system most commonly used in your discipline or in your source materials.
B、Ask your teacher/supervisor or university department whether they normally use a particular referencing system and choose the easiest one to use.
C、If your discipline uses different referencing systems with equal frequency, then choose the one you feel most comfortable using.