Gaya APA

Barnett, R, A., E, I, Z, M, R, I, B, K. (2000). Precalculus: a graphing approach . New York: .

Gaya MLA

Barnett, Raymond, A., E, I., Ziegler,, Michael, R, II., Byleen,, Karl. "Precalculus: a graphing approach". New York: , 2000. Text.