APA (7th ed.) Citation

Day, R. L. (1968). Concepts for modern marketing. International Textbook.

Chicago Style (17th ed.) Citation

Day, Ralph L. Concepts for Modern Marketing. Scranton: International Textbook, 1968.

MLA (9th ed.) Citation

Day, Ralph L. Concepts for Modern Marketing. International Textbook, 1968.

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