Cita APA (7a ed.)

Harrison, M. (1994). Proficiency Testbuilder (1st. ed.). Heinemann.

Cita Chicago Style (17a ed.)

Harrison, Mark. Proficiency Testbuilder. 1st. ed. Oxford: Heinemann, 1994.

Cita MLA (9a ed.)

Harrison, Mark. Proficiency Testbuilder. 1st. ed. Heinemann, 1994.