VALENTIN, E. K. (2015). Business planning and market strategy. SAGE.
芝加哥风格引文VALENTIN, E. K. Business Planning and Market Strategy. SAGE, 2015.
MLA引文VALENTIN, E. K. Business Planning and Market Strategy. SAGE, 2015.
警告：这些引文格式不一定是100％准确.
APA引文