Gaya APA

PAPALIA, D, E, -, S, W, O. (2007). ADULT DEVELOPMENT AND AGING (3). Amerika: McGraw -Hill Higher Education.

Gaya MLA

PAPALIA, DIANE, E, -, SALLY, WENDOKS, OLDS. "ADULT DEVELOPMENT AND AGING". 3 Amerika: McGraw -Hill Higher Education, 2007. Text.