Gaya APA

Lougheed, L. (1991). The prentice hall regents prep series for the TOEFL test : grammar skills builder (Sastra Inggris). Australia: Airlangga University Press.

Gaya MLA

Lougheed, Lin. "The prentice hall regents prep series for the TOEFL test : grammar skills builder". Sastra Inggris Australia: Airlangga University Press, 1991. .