Gaya APA

Hetherington, E, M., Parke, R, D. (1979). Child Psychology: A Contemporary Viewpoint . London: McGRAW - HILL INTERNATIONAL BOOK COMPANY.

Gaya MLA

Hetherington, E., Mavis., Parke, Ross, D.. "Child Psychology: A Contemporary Viewpoint". London: McGRAW - HILL INTERNATIONAL BOOK COMPANY, 1979. Text.