Gaya APA

Verhoeven, L, T., Jong, J, H, A, L, D. (1992). Construct of language proficiency: applications of psychological models to language assessment . pau: John Benjamins Pub. Co..

Gaya MLA

Verhoeven, Ludo, Th.., Jong, John, H., A., L., De. "Construct of language proficiency: applications of psychological models to language assessment". pau: John Benjamins Pub. Co., 1992. print.