APA引文

Kerr, J. R., & Littlefield, J. E. Marketing: An environmental approach.

Chicago Edition Citation

Kerr, John R., and James E. Littlefield. Marketing: An Environmental Approach.

MLA引文

Kerr, John R., and James E. Littlefield. Marketing: An Environmental Approach.

警告：這些引文格式不一定是100％准確.