L., J., M. et al.(1990).Essential of geometry for college students / Margaret L. Lial, Arnold R. Steffensen, L. Murphy Johnson .Glenview, Ill.:Scott Foresman/Little Brown Higher Education.
Gaya MLA
Johnson, Murphy, L.. et al."Essential of geometry for college students / Margaret L. Lial, Arnold R. Steffensen, L. Murphy Johnson".Glenview, Ill.:Scott Foresman/Little Brown Higher Education,1990.Textbook.