APA引文

Gorle, P., & Long, J. (1973). Essentials of product planning. McGraw-Hill.

Chicago Edition Citation

Gorle, Peter, and James Long. Essentials of Product Planning. London: McGraw-Hill, 1973.

MLA引文

Gorle, Peter, and James Long. Essentials of Product Planning. McGraw-Hill, 1973.

警告：這些引文格式不一定是100％准確.