APA (7th ed.) Citation

Rand, A., Branden, N., Greenspan, A., & Hessen, R. (1967). Capitalism : the unknown ideal / Ayn Rand ; with additional articles by Nathaniel Branden, Alan Greenspan, and Robert Hessen: The unknown ideal. Signet.

Chicago Style (17th ed.) Citation

Rand, Ayn, Nathaniel Branden, Alan Greenspan, and Robert Hessen. Capitalism : The Unknown Ideal / Ayn Rand ; with Additional Articles by Nathaniel Branden, Alan Greenspan, and Robert Hessen: The Unknown Ideal. New York: Signet, 1967.

MLA (9th ed.) Citation

Rand, Ayn, et al. Capitalism : The Unknown Ideal / Ayn Rand ; with Additional Articles by Nathaniel Branden, Alan Greenspan, and Robert Hessen: The Unknown Ideal. Signet, 1967.

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