Gaya APA

Lerner, R, M., Hultsch, D, F. (1983). Human Development. A Lifr-Span Perspective . United States of America: McGraw-Hil Book Company.

Gaya MLA

Lerner, Richard, M.., Hultsch, David, F.. "Human Development. A Lifr-Span Perspective". United States of America: McGraw-Hil Book Company, 1983. Text.