APA

ashley j. p., . (1977). principles of intermediate algebra. london: collier macmillan.

Chicago

ashley john p, . 1977. principles of intermediate algebra. london: collier macmillan.

Harvard

ashley j. p., . (1977). principles of intermediate algebra. london: collier macmillan.

MLA

ashley john p, . principles of intermediate algebra. london: collier macmillan. 1977.