APA (7th ed.) Citation

Ormrod, R., Henneberg, S., & O'Shaughnessy, N. Political marketing: Theory and concepts.

Chicago Style (17th ed.) Citation

Ormrod, Robert, Stephan Henneberg, and Nicholas O'Shaughnessy. Political Marketing: Theory and Concepts.

MLA (8th ed.) Citation

Ormrod, Robert, et al. Political Marketing: Theory and Concepts.