Gaya APA

Nawawi, H. et al (1982,1973,2013,2010,2014). Biology (2nd Ed.,Eleventh,Eleventh Edition,3rd Ed.). USA : CBS College Pub..

Gaya MLA

Nawawi, Hadari. et al. "Biology". 2nd Ed.,Eleventh,Eleventh Edition,3rd Ed. USA : CBS College Pub., 1982,1973,2013,2010,2014. Text.