APA (7th ed.) Citation

Major, G. (1992). Take charge!: How to manage your customer relationships (Executive ed.). Sigma Books.

Chicago Style (17th ed.) Citation

Major, Grace. Take Charge!: How to Manage Your Customer Relationships. Executive ed. Fairfax, Va.: Sigma Books, 1992.

MLA (9th ed.) Citation

Major, Grace. Take Charge!: How to Manage Your Customer Relationships. Executive ed. Sigma Books, 1992.