Gaya APA

Mader, S, S., Windelspecht, M. (2013). Biology eleventh edition (Eleventh Edition). New York: The MC Graw Hill Companies.

Gaya MLA

Mader, Sylvia, S.., Windelspecht, Michael. "Biology eleventh edition". Eleventh Edition New York: The MC Graw Hill Companies, 2013. Text.