Gaya APA

Lodico, M, G., Siregar, R, T, M, M, R. (2006). Methods in Educational Research : from Theory to Practice (-). New York: New York: McGraw-Hill.

Gaya MLA

Lodico, Marguerite, G.., Siregar, Robert, T., Manning;, Moelia, Radja. "Methods in Educational Research : from Theory to Practice". - New York: New York: McGraw-Hill, 2006. Fakultas keguruan.