Pechenik, J. A. (2010). A short guide to writing about biology (Seventh edition.). Longman.
Chicago-čujuhus (17. p.)Pechenik, Jan A. A Short Guide to Writing About Biology. Seventh edition. New York: Longman, 2010.
MLA-čujuhus (9. p.)Pechenik, Jan A. A Short Guide to Writing About Biology. Seventh edition. Longman, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.