Gaya APA

Mahnke, C, B, D, &, M, K. (1998). The Heinemann Elt Toefl Practice Test . : Macmilan Publishers Limited.

Gaya MLA

Mahnke, Carolyn, B., Duffy, &, M., Kathleen. "The Heinemann Elt Toefl Practice Test". : Macmilan Publishers Limited, 1998. Text.