Gaya APA

Langacker, R, W. (1973). Language and its structure some fundamental linguistic concepts (2). United States of America: Harcourt Brace Jovanovich, inc..

Gaya MLA

Langacker, Ronald, W.. "Language and its structure some fundamental linguistic concepts". 2 United States of America: Harcourt Brace Jovanovich, inc., 1973. Text.