SCHUMACHER D. (1994). SOFTWARE SOLUTION INC. AP. PROFESSIONAL.
芝加哥风格引文SCHUMACHER D. SOFTWARE SOLUTION INC. BOSTON: AP. PROFESSIONAL, 1994.
MLA引文SCHUMACHER D. SOFTWARE SOLUTION INC. AP. PROFESSIONAL, 1994.
警告：这些引文格式不一定是100％准确.
APA引文