Gaya APA

Rogers, R, K, H, H, S, H, J. (1991). Fundamentals of item response theory (1). United States of America: Sage Publications, inc..

Gaya MLA

Rogers, Ronald, K., Hambleton, H., Swaminathan, H., Jane. "Fundamentals of item response theory". 1 United States of America: Sage Publications, inc., 1991. Text.