Gaya APA

Henkenbach, A, J., Colby, I, K, J. (1970). Elementary functions an approach to precalculus mathematics . New York: New York: The Macmillan; 1970.

Gaya MLA

Henkenbach, Alan, J.., Colby, I., Kegley,, J.. "Elementary functions an approach to precalculus mathematics". New York: New York: The Macmillan; 1970, 1970. Text.