Gaya APA

Enger, E, D., Ross, F, C. (2003). Laboratory Manual : Concepts in Biology (Ed. 3). Boston: McGraw-Hil Companies,Inc..

Gaya MLA

Enger, Eldon, D.., Ross, Frederick, C.. "Laboratory Manual : Concepts in Biology". Ed. 3 Boston: McGraw-Hil Companies,Inc., 2003. Text.