Walker, O. C. (2009). Marketing Strategy (5th.). Tata McGraw Hill Education Private Limited.
芝加哥风格引文Walker, Orville C. Marketing Strategy. 5th. New Delhi: Tata McGraw Hill Education Private Limited, 2009.
MLA引文Walker, Orville C. Marketing Strategy. 5th. Tata McGraw Hill Education Private Limited, 2009.
警告：这些引文格式不一定是100％准确.