Gaya APA

Hurlock, E, B., Swanson, C, P. (1980). Developmental psychology Life-span approach (ED 5). NewDelhi:: McGraw-Hill.

Gaya MLA

Hurlock, Elizabeth, B.., Swanson, Carl, P.. "Developmental psychology Life-span approach". ED 5 NewDelhi:: McGraw-Hill, 1980. Text.