Cita APA (7th ed.)
ZEDLEWSKI, S., & ET AL. (1993). THE NEEDS OF THE ELDERLY IN THE 21ST CENTURY. URBAN INSTITUTE PRESS.
Cita Chicago (17th ed.)
ZEDLEWSKI, S.R, i ET AL. THE NEEDS OF THE ELDERLY IN THE 21ST CENTURY. WASHINGTON,DC (USA): URBAN INSTITUTE PRESS, 1993.
Cita MLA (9th ed.)
ZEDLEWSKI, S.R, i ET AL. THE NEEDS OF THE ELDERLY IN THE 21ST CENTURY. URBAN INSTITUTE PRESS, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.