Cita APA (7th ed.)

ebrary, Inc, & Leung, P. (2011). Healthy aging. World Scientific Pub. Co..

Cita Chicago (17th ed.)

ebrary, Inc, i Ping-Chung Leung. Healthy Aging. Hackensack, N.J.: World Scientific Pub. Co., 2011.

Cita MLA (9th ed.)

ebrary, Inc, i Ping-Chung Leung. Healthy Aging. World Scientific Pub. Co., 2011.