Gaya APA

Johnson, M, L. 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.