Cita APA (7a ed.)

Crystal, D. (1969). What is linguistics? (2nd ed.). Edward Arnold.

Cita Chicago Style (17a ed.)

Crystal, David. What Is Linguistics? 2nd ed. London: Edward Arnold, 1969.

Cita MLA (8a ed.)

Crystal, David. What Is Linguistics? 2nd ed. Edward Arnold, 1969.