APA (7th ed.) Citation

Achenbaum, W. A. (2013). Robert N. Butler, MD: Visionary of Healthy Aging.

Chicago Style (17th ed.) Citation

Achenbaum, W. Andrew. Robert N. Butler, MD: Visionary of Healthy Aging. 2013.

MLA (9th ed.) Citation

Achenbaum, W. Andrew. Robert N. Butler, MD: Visionary of Healthy Aging. 2013.

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