McCall Smith, A. (2004). Portuguese irregular verbs. Mr.Kamal Ahmad/CEO.
芝加哥风格引文McCall Smith, Alexander. Portuguese Irregular Verbs. Canada: Mr.Kamal Ahmad/CEO, 2004.
MLA引文McCall Smith, Alexander. Portuguese Irregular Verbs. Mr.Kamal Ahmad/CEO, 2004.
警告：这些引文格式不一定是100％准确.