Wheeler, H. (1994). Popular cyclopaedia of life science. New Delhi.
Dyfyniad Arddull ChicagoWheeler, Harold. Popular Cyclopaedia of Life Science. C'wealth publishers: New Delhi, 1994.
Dyfyniad MLAWheeler, Harold. Popular Cyclopaedia of Life Science. New Delhi, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.