APA (7th ed.) Citation

Ryan, W. T. (1971). Principles of marketing. Richard D. Irwin.

Chicago Style (17th ed.) Citation

Ryan, William T. Principles of Marketing. Richard D. Irwin, 1971.

MLA (8th ed.) Citation

Ryan, William T. Principles of Marketing. Richard D. Irwin, 1971.

Warning: These citations may not always be 100% accurate.