Παραπομπή APA

Crystal ,David. (1971). Linguisics. Penguin Books, England.

Παραπομπή Chicago Style

Crystal ,David. Linguisics. Penguin Books, England: Penguin Books, England, 1971.

Παραπομπή MLA

Crystal ,David. Linguisics. Penguin Books, England, 1971.