Tohutoro APA (7th ed.)
Barnett, R. A. (1989). Precalculus functions and graph (2nd. ed.). McGraw-Hill.
Tohutoru Kātū Chicago (17th ed.)
Barnett, Raymond A. Precalculus Functions and Graph. 2nd. ed. New York: McGraw-Hill, 1989.
Tohutoro MLA (9th ed.)
Barnett, Raymond A. Precalculus Functions and Graph. 2nd. ed. McGraw-Hill, 1989.
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