APA

Johnston (C.L) ;Willis (Alden T), . (1995). Intermediate Algebra. Ed.6. : .

Chicago

Johnston (C.L) ;Willis (Alden T), . 1995. Intermediate Algebra. Ed.6. : .

Harvard

Johnston (C.L) ;Willis (Alden T), . (1995). Intermediate Algebra. Ed.6. : .

MLA

Johnston (C.L) ;Willis (Alden T), . Intermediate Algebra. Ed.6. : . 1995.