Gaya APA

Santrock, J, W., Grayson, T, T. (2008). Study guide to accompany 'Life-span development' (11th ed.). New York: McGraw-Hill.

Gaya MLA

Santrock, John, W.., Grayson, Troianne, T.. "Study guide to accompany 'Life-span development'". 11th ed. New York: McGraw-Hill, 2008. Text.