Gaya APA

Sorensen, D, A, L, C, J, C, K. (2010). Introduction to research in education (8th edition). USA: WADSWORTH CENGAGE Learning.

Gaya MLA

Sorensen, Donald, Ary,, Lucy, Cheser, Jacobs,, Christine, K.. "Introduction to research in education". 8th edition USA: WADSWORTH CENGAGE Learning, 2010. Text.