Gaya APA

Freiberg, K, L. (2005). Annual edtions : human development. 33th ed. (33). Dubuque: McGraw-Hill Dushkin.

Gaya MLA

Freiberg, Karen, L.. "Annual edtions : human development. 33th ed.". 33 Dubuque: McGraw-Hill Dushkin, 2005. Text.