Gaya APA

Freeman, S., Cynthia, I, H, J, I, G. (2011). Practicing biology: a student workbook for biological science . San Francisco: San Francisco: Benjamin Cummings, 2011.

Gaya MLA

Freeman, Scott., Cynthia, I., Heitz,, Jean, II., Giffen,. "Practicing biology: a student workbook for biological science". San Francisco: San Francisco: Benjamin Cummings, 2011, 2011. .