Cita APA (7th ed.)
ERICSON, H. (1992). SENIOR CENTER STANDARDS AND SELF-ASSESSMENT WORKBOOK. GUIDELINES FOR PRACTICE. 1990 EDITION. NATIONAL COUNCIL ON THE AGING, THE.
Cita Chicago (17th ed.)
ERICSON, H. SENIOR CENTER STANDARDS AND SELF-ASSESSMENT WORKBOOK. GUIDELINES FOR PRACTICE. 1990 EDITION. WASHINGTON,DC (USA): NATIONAL COUNCIL ON THE AGING, THE, 1992.
Cita MLA (9th ed.)
ERICSON, H. SENIOR CENTER STANDARDS AND SELF-ASSESSMENT WORKBOOK. GUIDELINES FOR PRACTICE. 1990 EDITION. NATIONAL COUNCIL ON THE AGING, THE, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.