Cita APA (7a ed.)

Underhill, N. (1991). Testing spoken language: : a handbook of oral testing techniques. University Press.

Cita Chicago Style (17a ed.)

Underhill, Nic. Testing Spoken Language: : A Handbook of Oral Testing Techniques. Cambridge [etc.]: University Press, 1991.

Cita MLA (9a ed.)

Underhill, Nic. Testing Spoken Language: : A Handbook of Oral Testing Techniques. University Press, 1991.