Guttman, B. S. (1999). Student study guide to accompany Biology. WCB/McGraw-Hill.
Trích dẫn kiểu ChicagoGuttman, Burton S. Student Study Guide to Accompany Biology. WCB/McGraw-Hill, 1999.
MLA引文Guttman, Burton S. Student Study Guide to Accompany Biology. WCB/McGraw-Hill, 1999.
警告：這些引文格式不一定是100％准確.