Cita APA (7th ed.)
HERRERA, P. (1987). INNOVATIVE PROGRAMMING FOR THE AGING AND AGED. EXPLORATION SERIES PRESS.
Cita Chicago (17th ed.)
HERRERA, P.M. INNOVATIVE PROGRAMMING FOR THE AGING AND AGED. OHIO (USA): EXPLORATION SERIES PRESS, 1987.
Cita MLA (9th ed.)
HERRERA, P.M. INNOVATIVE PROGRAMMING FOR THE AGING AND AGED. EXPLORATION SERIES PRESS, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.